Introduction to React-Native
- Difference between React & ReactNative
- Why one should use ReactNative?
- Basic Components
- Life Cycle of Component
- Environment Setup
Google App Engine is Google's Platform as a Service that allows users to run scalable web applications on Google's infrastructure. Written in Java or Python, apps run in a managed sandbox and use Google's non-relational Datastore and other services. Key features include automatic scaling, high availability, easy setup, and a free usage tier.
Js foo famo.us- build native quality apps using html5 within a dayDebnath Sinha
This document outlines a talk about building native quality apps using HTML5. It discusses the speaker's experience with hybrid mobile app development and issues with early HTML5 apps being slow. It introduces Famo.us, a JavaScript library that uses GPU acceleration techniques to provide smooth animations and render apps faster. Examples are given of large companies successfully using HTML5 hybrid apps. The document argues that with tools like Famo.us and improved compilers, performance issues will be addressed and HTML5 is a good approach for building mobile apps.
What is React-Native?
Why React-Native?
How React-Native works in detail?
- Metro bundler
- Main Thread
- Shadow Thread
- Javascript Thread
Yoga Engine
Threads Communication in React-Native
Comparison with Flutter and Native
React-Native Components
React Native allows developers to build mobile apps using JavaScript and React, enabling code sharing between Android and iOS. It renders native components for better performance compared to hybrid frameworks, though separate codebases must be maintained for each platform. Testing is done on actual mobile devices rather than in a browser. React Native is growing in popularity due to its embrace of functional programming principles and large ecosystem of plugins.
Famo.us - build native quality apps using html5 within a dayDebnath Sinha
The document summarizes a talk about building native-quality apps using HTML5 through the Famo.us framework. It discusses how HTML5 was initially seen as too slow for mobile apps but compilers and frameworks improved. It introduces Famo.us, which uses the GPU to accelerate animations and rendering for a native-like feel. It acknowledges debugging tools still need work but Famo.us aims to address performance issues and enable quick development of high-quality hybrid mobile apps.
PHP Mega Meetup, Sep, 2020, Anti patterns in phpAhmed Abdou
PHP is one of the easiest programming languages to use ever and powers more than half of the internet.
With this ease of use, certain common patterns emerge that become harmful. This is especially true when your product or service is not expected to die soon. Some anti-patterns are coding, others are related to operating your service, especially with new docker stacks. We will go over some of the most common pitfalls with a focus on enterprise development.
9 reasons why programmers should learn react nativeReact Sharing
A React Native app is a real mobile app
With React Native, you don't build a “mobile web app”, an “HTML5 app”, or a “hybrid app”. You build a real mobile app that's indistinguishable from an app built using Objective-C or Java. React Native uses the same fundamental UI building blocks as regular iOS and Android apps. You just put those building blocks together using JavaScript and React.
Js foo famo.us- build native quality apps using html5 within a dayDebnath Sinha
This document outlines a talk about building native quality apps using HTML5. It discusses the speaker's experience with hybrid mobile app development and issues with early HTML5 apps being slow. It introduces Famo.us, a JavaScript library that uses the GPU to accelerate animations and rendering for a native-like feel. LinkedIn's hybrid app is cited as an example of high HTML5 usage. The document argues compilers will continue improving HTML5 performance and tools are the main hurdle now rather than raw technology capabilities.
Java is considered more secure than C# as it does not use pointers and the JVM handles security when bytecode is executed. Java is also more scalable due to its bytecode requiring less interpretation, making it faster, and its robust threading model allowing multiple tasks to run in parallel. However, C# has more accuracy when using complex numbers as Java requires a third-party library for this. Java is also seen as more reliable than C# as Java programs are portable across networks and Java objects do not contain references to external data. Overall, Java's performance is considered better than C# as it is faster and has an independent and user-friendly structure.
Feedback on the transition from a React webapp to a React Native app. These slides are from my talk for Facebook Developer Circles Paris at The Family. I will publish a Medium article soon...
The document is a presentation about building native mobile apps using JavaScript with Titanium Mobile. It introduces Titanium Mobile as a tool that allows building cross-platform native apps using web technologies like JavaScript. The presentation demonstrates building a "Hello World" app in Titanium Mobile and walks through code from the Snapost sample app. It concludes by providing resources for getting started with Titanium Mobile development.
Cypress has been gaining popularity during last couple of years. This tool aims to redefine a lot of established concepts that were present in end-to-end testing. Starting with Cypress feels like taking on a totally new testing journey. To be honest, it IS a different journey, but an exciting one. In this webinar, Cypress Ambassador Filip Hric, walks you through the first steps of how to start working with Cypress. Take away a solid understanding of what this tool can and cannot do for you.
How to survive the JavaScript apocalypsePóth Attila
1) The JavaScript ecosystem has evolved rapidly over the last 20 years from simple PHP + static HTML + JS sites to complex single-page applications using modern frameworks and build tools.
2) Developers working with early JavaScript faced challenges like browser incompatibilities and a lack of standards, while modern developers must contend with an overabundance of libraries and framework options as well as complex build processes.
3) To succeed in today's environment, developers must master core JavaScript concepts, learn modular code design patterns and frameworks, use task runners and bundlers effectively, and stay aware of emerging trends and technologies.
React Native allows developers to write mobile apps using JavaScript and React that run natively on iOS and Android, avoiding the need to learn and use Objective-C, Swift, or Android Java. It addresses issues with single-threaded JavaScript by using a main thread with asynchronous and batched updates to improve app performance. While native languages are established, React Native enables writing code once that runs on both platforms and lowers the barrier to mobile development.
UI is the first thing which sells your application and it has been a while since we have thought to look for an alternative framework for developing UI other than Javascript. Suddenly the adoption of JS based framework like AngularJS, ReactJS, UI5 and D3JS have made Javascript the de-facto standard to create and build your UI. But is it the only option we have and the bigger question is why or why not some other tech stack replaces Javascript on UI.
Know the dark side of the Javascript frameworks for building UI, its limitation, its bad parts and learn to which extent you can push Javascript while developing UI.
Stay Connected with us!
Mail us: [email protected][email protected]
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Ofir Dagan - (Don’t) Blame it on React Native - Codemotion Rome 2019Codemotion
When writing large scale react native app it’s always fun to blame rn for everything that is wrong in our lives. However, what we keep finding, again and again, is that for most of the cases. Writing better performant react code can fix our performance issues. In the last couple of years our team built a huge production app in react native. In this talk I’ll go over some of our lessons learned in regards of react native performance and how to improve your app’s performance subsequently.
This document summarizes the author's experiences at a week-long "Geek Sleep-away Camp" for programmers. Some of the key things the author learned include:
- They built a basic CRUD web application using a Java/Scala framework called Play in just a few hours.
- Heroku is a cloud platform that makes deploying applications easy.
- NoSQL databases like Neo4j's graph databases can be useful for certain types of data and queries.
- Tools like JRebel, HipChat, and Camscanner Plus were demonstrated for improving productivity.
- Presentations were in an "open space" format with discussions rather than traditional lectures.
This is "Megam Cloud's start-up story". "Megam Cloud - Polygot PaaS with cross cloud, real-time log streaming and metering/monitoring builtin". We'll launch our beta soon (http://www.megam.co)
Sit back and enjoy. This has lessons learnt, the challenges we overcame and will help any start-up venturing in Growth Markets.
If you are business and find our services useful, we are all ears plugged to you.
Note: The start-up story in mature markets is totally the opposite of what happens in Growth markets.
The document provides tips and recommendations for mobile development for startups. It discusses the importance of collaboration on teams, creating prototypes and MVPs, understanding user experience, using version control and code reviews, automating processes, choosing native vs hybrid development, selecting backend technologies, and writing clean and solid code. The document emphasizes the need for concise, clear messaging and recommends resources for further information.
The document discusses Ruby on Rails, a web application framework. It provides an overview of Ruby and Rails, explaining that Ruby is an object-oriented programming language and Rails is a full-stack framework built on Ruby that follows the model-view-controller pattern. It also discusses how Rails emphasizes conventions over configuration and helps developers build applications quickly.
This document provides information about a workshop on artificial intelligence using Keras and Azure. It discusses applications of vision, speech, and natural language processing. It outlines the steps for the workshop which include registering for an Azure subscription, completing a computer vision or natural language processing learning path, and getting bonus challenges for finishing both.
5 reasons why NetBeans should be in every developers toolkit (devfest2014)idrsolutions
This document outlines 5 reasons why the developer toolkit NetBeans should be used by all developers. It discusses how NetBeans allows users to work with multiple projects and languages at once using plugins, helps with debugging code through its configurable toolbar, makes automated testing easy through JUnit and scripting for continuous integration, assists with writing better code quicker through its features, and can be used as a platform for developing applications. The document is the opinion of a Java developer who has experience using various IDEs and toolkits including NetBeans.
Java is a programming language created by Sun Microsystems in 1990 that was originally intended for smart appliances but became widely used for websites and applications on computers and devices. It is a class-based, object-oriented language that is designed to be portable so that programs can run on any device that supports Java. While originally owned by Sun Microsystems, Java is now owned by Oracle and remains one of the most popular programming languages, with over 3 billion devices running Java programs for uses like websites, games, and business applications.
This document discusses the author's work on building interactive programming environments directly in the browser. It summarizes that the author dreamed of a portable browser-based REPL (read-eval-print loop) and created http://repl.it which supports 17 programming languages in the browser using a JavaScript library. It also discusses how JavaScript has become an accidental web virtual machine that many other languages compile to.
Java is a general purpose programming language that is widely used for web applications. It enables users to develop and deploy applications on the Internet for servers, desktop computers, and small hand-held devices. Java applications are compiled into bytecode that runs on a Java Virtual Machine (JVM) allowing them to run on any platform that supports Java. Key Java technologies include Java Servlets for developing web applications, JavaServer Pages (JSP) to create dynamic web content, and Enterprise JavaBeans (EJB) for building the business logic of enterprise applications. J2EE (Java 2 Enterprise Edition) is a specification that provides a framework for developing multi-tiered, web-based enterprise applications.
9 reasons why programmers should learn react nativeReact Sharing
A React Native app is a real mobile app
With React Native, you don't build a “mobile web app”, an “HTML5 app”, or a “hybrid app”. You build a real mobile app that's indistinguishable from an app built using Objective-C or Java. React Native uses the same fundamental UI building blocks as regular iOS and Android apps. You just put those building blocks together using JavaScript and React.
Js foo famo.us- build native quality apps using html5 within a dayDebnath Sinha
This document outlines a talk about building native quality apps using HTML5. It discusses the speaker's experience with hybrid mobile app development and issues with early HTML5 apps being slow. It introduces Famo.us, a JavaScript library that uses the GPU to accelerate animations and rendering for a native-like feel. LinkedIn's hybrid app is cited as an example of high HTML5 usage. The document argues compilers will continue improving HTML5 performance and tools are the main hurdle now rather than raw technology capabilities.
Java is considered more secure than C# as it does not use pointers and the JVM handles security when bytecode is executed. Java is also more scalable due to its bytecode requiring less interpretation, making it faster, and its robust threading model allowing multiple tasks to run in parallel. However, C# has more accuracy when using complex numbers as Java requires a third-party library for this. Java is also seen as more reliable than C# as Java programs are portable across networks and Java objects do not contain references to external data. Overall, Java's performance is considered better than C# as it is faster and has an independent and user-friendly structure.
Feedback on the transition from a React webapp to a React Native app. These slides are from my talk for Facebook Developer Circles Paris at The Family. I will publish a Medium article soon...
The document is a presentation about building native mobile apps using JavaScript with Titanium Mobile. It introduces Titanium Mobile as a tool that allows building cross-platform native apps using web technologies like JavaScript. The presentation demonstrates building a "Hello World" app in Titanium Mobile and walks through code from the Snapost sample app. It concludes by providing resources for getting started with Titanium Mobile development.
Cypress has been gaining popularity during last couple of years. This tool aims to redefine a lot of established concepts that were present in end-to-end testing. Starting with Cypress feels like taking on a totally new testing journey. To be honest, it IS a different journey, but an exciting one. In this webinar, Cypress Ambassador Filip Hric, walks you through the first steps of how to start working with Cypress. Take away a solid understanding of what this tool can and cannot do for you.
How to survive the JavaScript apocalypsePóth Attila
1) The JavaScript ecosystem has evolved rapidly over the last 20 years from simple PHP + static HTML + JS sites to complex single-page applications using modern frameworks and build tools.
2) Developers working with early JavaScript faced challenges like browser incompatibilities and a lack of standards, while modern developers must contend with an overabundance of libraries and framework options as well as complex build processes.
3) To succeed in today's environment, developers must master core JavaScript concepts, learn modular code design patterns and frameworks, use task runners and bundlers effectively, and stay aware of emerging trends and technologies.
React Native allows developers to write mobile apps using JavaScript and React that run natively on iOS and Android, avoiding the need to learn and use Objective-C, Swift, or Android Java. It addresses issues with single-threaded JavaScript by using a main thread with asynchronous and batched updates to improve app performance. While native languages are established, React Native enables writing code once that runs on both platforms and lowers the barrier to mobile development.
UI is the first thing which sells your application and it has been a while since we have thought to look for an alternative framework for developing UI other than Javascript. Suddenly the adoption of JS based framework like AngularJS, ReactJS, UI5 and D3JS have made Javascript the de-facto standard to create and build your UI. But is it the only option we have and the bigger question is why or why not some other tech stack replaces Javascript on UI.
Know the dark side of the Javascript frameworks for building UI, its limitation, its bad parts and learn to which extent you can push Javascript while developing UI.
Stay Connected with us!
Mail us: [email protected][email protected]
Youtube: https://www.youtube.com/c/UI5CommunityNetwork?sub_confirmation=1
Facebook: https://www.facebook.com/goui5cn
Twitter: https://twitter.com/ui5cn
Google+ : https://plus.google.com/+UI5CommunityNetwork
Ofir Dagan - (Don’t) Blame it on React Native - Codemotion Rome 2019Codemotion
When writing large scale react native app it’s always fun to blame rn for everything that is wrong in our lives. However, what we keep finding, again and again, is that for most of the cases. Writing better performant react code can fix our performance issues. In the last couple of years our team built a huge production app in react native. In this talk I’ll go over some of our lessons learned in regards of react native performance and how to improve your app’s performance subsequently.
This document summarizes the author's experiences at a week-long "Geek Sleep-away Camp" for programmers. Some of the key things the author learned include:
- They built a basic CRUD web application using a Java/Scala framework called Play in just a few hours.
- Heroku is a cloud platform that makes deploying applications easy.
- NoSQL databases like Neo4j's graph databases can be useful for certain types of data and queries.
- Tools like JRebel, HipChat, and Camscanner Plus were demonstrated for improving productivity.
- Presentations were in an "open space" format with discussions rather than traditional lectures.
This is "Megam Cloud's start-up story". "Megam Cloud - Polygot PaaS with cross cloud, real-time log streaming and metering/monitoring builtin". We'll launch our beta soon (http://www.megam.co)
Sit back and enjoy. This has lessons learnt, the challenges we overcame and will help any start-up venturing in Growth Markets.
If you are business and find our services useful, we are all ears plugged to you.
Note: The start-up story in mature markets is totally the opposite of what happens in Growth markets.
The document provides tips and recommendations for mobile development for startups. It discusses the importance of collaboration on teams, creating prototypes and MVPs, understanding user experience, using version control and code reviews, automating processes, choosing native vs hybrid development, selecting backend technologies, and writing clean and solid code. The document emphasizes the need for concise, clear messaging and recommends resources for further information.
The document discusses Ruby on Rails, a web application framework. It provides an overview of Ruby and Rails, explaining that Ruby is an object-oriented programming language and Rails is a full-stack framework built on Ruby that follows the model-view-controller pattern. It also discusses how Rails emphasizes conventions over configuration and helps developers build applications quickly.
This document provides information about a workshop on artificial intelligence using Keras and Azure. It discusses applications of vision, speech, and natural language processing. It outlines the steps for the workshop which include registering for an Azure subscription, completing a computer vision or natural language processing learning path, and getting bonus challenges for finishing both.
5 reasons why NetBeans should be in every developers toolkit (devfest2014)idrsolutions
This document outlines 5 reasons why the developer toolkit NetBeans should be used by all developers. It discusses how NetBeans allows users to work with multiple projects and languages at once using plugins, helps with debugging code through its configurable toolbar, makes automated testing easy through JUnit and scripting for continuous integration, assists with writing better code quicker through its features, and can be used as a platform for developing applications. The document is the opinion of a Java developer who has experience using various IDEs and toolkits including NetBeans.
Java is a programming language created by Sun Microsystems in 1990 that was originally intended for smart appliances but became widely used for websites and applications on computers and devices. It is a class-based, object-oriented language that is designed to be portable so that programs can run on any device that supports Java. While originally owned by Sun Microsystems, Java is now owned by Oracle and remains one of the most popular programming languages, with over 3 billion devices running Java programs for uses like websites, games, and business applications.
This document discusses the author's work on building interactive programming environments directly in the browser. It summarizes that the author dreamed of a portable browser-based REPL (read-eval-print loop) and created http://repl.it which supports 17 programming languages in the browser using a JavaScript library. It also discusses how JavaScript has become an accidental web virtual machine that many other languages compile to.
Java is a general purpose programming language that is widely used for web applications. It enables users to develop and deploy applications on the Internet for servers, desktop computers, and small hand-held devices. Java applications are compiled into bytecode that runs on a Java Virtual Machine (JVM) allowing them to run on any platform that supports Java. Key Java technologies include Java Servlets for developing web applications, JavaServer Pages (JSP) to create dynamic web content, and Enterprise JavaBeans (EJB) for building the business logic of enterprise applications. J2EE (Java 2 Enterprise Edition) is a specification that provides a framework for developing multi-tiered, web-based enterprise applications.
Java & J2EE Struts with Hibernate FrameworkMohit Belwal
This document provides an overview of Java 2 Enterprise Edition (J2EE) and its core components. J2EE is a multi-tiered architecture for developing enterprise applications and web applications using Java technology. It uses a component-based model where components like servlets, JavaServer Pages (JSPs), and Enterprise JavaBeans (EJBs) interact with services provided by containers like web containers and EJB containers. The document discusses J2EE concepts, features, benefits, components, containers, and how applications are packaged and deployed. It also provides examples of servlets and JSPs as core web components in J2EE.
This document provides an introduction and overview of the Java programming language. It begins with the presenter's name and ID, then defines Java as a high-level, class-based object-oriented language that is human-readable. The document notes that Java was created by Sun Microsystems in 1995 and is now owned by Oracle. It discusses the early history of Java, originally called Oak, and how it was first released publicly in 1995 and designed for use on mobile devices. The document then lists several key features of Java like being platform independent, object-oriented, supporting web applications, and being robust and secure. It explains how Java achieves platform independence through the use of bytecode that is executed by the Java Virtual Machine on any
This document provides an introduction and overview of the Java programming language. It begins with the presenter's name and ID, then defines Java as a high-level, class-based object-oriented language that is human-readable. The document notes that Java was created by Sun Microsystems in 1995 and is now owned by Oracle. It discusses the early history of Java, originally called Oak, and how it was first released publicly in 1995 and designed for use on mobile devices. The document then lists some key features of Java like being platform independent, object-oriented, supporting web applications, and being robust and secure. It explains how Java achieves platform independence through the use of bytecode that is executed by the Java Virtual Machine (J
I am a passionate reader of topics on new trends and best practices in software development. In my spare time, i like to read essays, listen podcasts, view webinars and examine source code of other developers, in order to learn from them.
Every time I find a quote that proves motivating for me and other developers, I try to save it, and then share it with my friends and classmates.
This work is a collection of twenty quotations that have impacted positively on my work style and way of thinking. The order they are published do not due to any selection criteria, it's just the order they were read and filed.
The document summarizes a presentation on Java programming language given by Pradeep Sahu and Sheeba Yasmin. It defines Java as an object-oriented programming language and platform, describes its uses in desktop and web applications, enterprise software and more. Key features of Java discussed include being simple, object-oriented, distributed, architecture neutral, robust, interpreted/compiled, secure and portable. The document also outlines Java Virtual Machine, advantages such as simplicity and platform independence, and disadvantages including slow performance and lack of low-level support.
Introduction to Java: History, Versioning, The Java Virtual Machine, Byte code, Writing simple
java program, Language Components: Primitive Data Types, Comments, Keywords, literals, The
break Statement, The continue Statement, Operators – Casts and Conversions, Arrays. Introduction
to classes and methods, constructors, Passing Objects to Methods, Method Overloading, Static and
final, The this Reference, finalize, inner and nested classes. Inheriting class, extends, member
access and inheritance, super keyword, Object class. Dynamic method dispatch, method overriding,
abstract class, interface, packages, import statement
This document provides an overview of the Java programming language. It discusses that Java was created by James Gosling in 1991 at Sun Microsystems as a class-based, object-oriented language designed to be portable and have as few implementation dependencies as possible. The first public version was released in 1995. Java's syntax is similar to C and C++ but is simpler. It aims to allow software to be written once and run on any system with a Java Virtual Machine.
This document provides an overview of Java fundamentals including:
- A brief history of Java's development from 1991-1995.
- An explanation of how Java code is compiled to bytecode and run on any machine by a Java Virtual Machine (JVM), making Java platform independent.
- Descriptions of Java applications and applets, the Java Development Kit (JDK), Java Runtime Environment (JRE), and object-oriented programming principles in Java like inheritance and polymorphism.
- Details of Java's features like being compiled and interpreted, platform independent, object-oriented, robust, secure, distributed, and multi-threaded.
- An example of the "Hello World" first Java program.
Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers write once, run anywhere (WORA),meaning that compiled Java code can run on all platforms that support Java without the need to recompile.
In this ppt I have described all about java like :- What is java , features, Advantages, Disadvantages, Accelerate your java developer career , career opportunities, Versions etc.
It's better to know the story of the technology you work, you need to know why it's created, what are the problems it solves.
Here, you will know the story of the most famous technology.
Man, It's Java
It's better to know the story of the technology you work, you need to know why it's created, what are the problems it solves.
Here, you will know the story of the most famous technology.
Man, It's Java
1. Java is an object-oriented programming language that is compiled into bytecode that can run on any machine with a Java Virtual Machine (JVM).
2. Key features of Java include being simple, secure, portable, object-oriented, robust, multithreaded, architecture-neutral, interpreted, high-performance, distributed, and dynamic.
3. Java's use of bytecode compilation and interpretation by the JVM allows Java programs to execute reliably across different hardware and operating systems.
Rahul Singh presented on Java. Java is a general-purpose, object-oriented programming language that is designed to have as few implementation dependencies as possible so that code can run on any Java virtual machine. Key principles of Java include that it must be simple, robust, architecture-neutral, portable, high-performance, and interpreted/threaded/dynamic. Java has been updated through various versions since its initial release in 1995 and the Java platform allows programs to run similarly on different hardware/operating systems using Java bytecode. Rahul Singh promotes Java training provided by Iteducenter.
Rahul Singh presented on Java. Java is a general-purpose, object-oriented programming language that is designed to have as few implementation dependencies as possible so that code can run on any Java virtual machine. Key principles of Java include that it must be simple, robust, architecture-neutral, portable, and have high performance. Java has undergone several versions since its initial release in 1995 and powers many client-server web applications. The Java platform uses bytecode that runs on a virtual machine, allowing programs to run similarly on different hardware and operating systems. Rahul encouraged attendees to learn Java, citing benefits like its ease of use, rich APIs, documentation support, and platform independence.
Programming languages allow humans to communicate with computers and come in many types that are constantly changing. Early computers included the Difference Engine and ENIAC. Von Neumann introduced key programming concepts. Grace Hopper created the first compiler. Popular early languages included Fortran, Cobol, and Lisp. C was developed by Dennis Ritchie and is widely used today. Object oriented programming organizes code around objects rather than actions. Modern languages like Java, Python, C++, Objective-C, Haskell, SQL, Javascript, Perl and more are used across industries for various applications. Intellectual property and licensing govern software ownership and use, while careers in programming span roles like programming, architecture, development and security.
Java has become popular due to its design features that allow programs to run on any platform. It is simple, object-oriented, distributed, interpreted, robust, secure, architecture-neutral, portable, high-performance, multithreaded, and dynamic. Java simplifies programming by eliminating pointers and multiple inheritance found in C++. It is inherently object-oriented and focuses on creating, manipulating, and connecting objects. Java also makes distributed computing easy by integrating networking capabilities.
The document discusses testing with Spock, a Groovy-based testing framework. It provides examples of different Spock features like BDD-style tests using Given-When-Then, data-driven testing with the @Unroll annotation, mocking, and sharing test state between specifications using the @Shared annotation or setupSpec method. It also covers Spock's integration with JUnit and how to write Spock tests that are compatible with both JUnit 4 and JUnit 5.
Evolving with Java - How to Remain EffectiveNaresha K
Slides from my Java2Days 2020 talk - "Evolving with Java - How to Remain Effective".
Developers find themselves in need to continually update themselves with the rapidly changing technologies to remain relevant and deliver value. However, by keeping a few things in mind and with certain practices, this can be a pleasant experience. In this presentation, I share my experiences learning and evolving with Java in the last 15+ years. The ideas presented are generic enough to be applicable for people using any technology stack. However, the code examples are in Java/ JVM languages.
We start by understanding the importance of gradual improvement. To keep motivated for continuous improvement, in my experience, responsiveness is a vital element. I share my experience of how to increase your responsiveness. To be able to change/ experiment continuously in our code, we need to ensure that we don't break anything. We explore the necessary techniques to achieve safety. Often we mistakenly consider lack of familiarity as complexity. We explore options to come out of this confusion. We then touch upon the impact of learning paradigms and multiple languages available on the JVM. Finally, we touch upon another important aspect of continuous improvement that is unlearning. We conclude the session by summarising the principles.
Take Control of your Integration Testing with TestContainersNaresha K
1) TestContainers is a Java library that supports integration testing with real databases, services, and APIs without requiring heavy infrastructure. It uses Docker containers to launch and initialize external dependencies for tests.
2) The document discusses how to use TestContainers to test against databases like MySQL and services like S3 storage. It provides code examples of initializing containers and writing integration tests against them.
3) TestContainers supports various databases and services out of the box. It can also be used to launch generic Docker images and Docker Compose configurations to test against complex environments.
Slides from my demonstration of implementing resilience with micronaut framework. The patterns included in the demo consists of the timeout, retry, circuit breaker, and fallback.
Take Control of your Integration Testing with TestContainersNaresha K
Slides from my demonstration titled "Take Control of your Integration Testing with TestContainers". Demonstrates using TestContainers for RDBMS and test driving S3 API with localstack.
Slides from my APACHECON@HOME 2020 talk - "Favouring Composition - The Groovy Way".
Most developers I met agree that composition is better than inheritance. However, in most codebases, we see the use of inheritance where composition would have been a better design choice. Then why are the Java developers falling into this trap? It is easy to implement inheritance over composition. But we end up paying for the consequences in terms of reduced maintainability. Can language offer anything for the developers to implement composition? In this presentation, I walk you through what Groovy has to offer to make sure implementing composition is as easy as inheritance, if not simpler. I dive into three techniques for applying the composition in your Groovy applications. We start with the technique of delegation and see how easy it is to implement compositions. We uncover the limitations of this technique and introduce traits. After walking through plenty of code examples covering various aspects of using traits, we briefly touch upon functional composition, since Groovy also supports functional programming.
Effective Java with Groovy - How Language Influences Adoption of Good PracticesNaresha K
This document summarizes key points from a presentation about how the Groovy programming language helps developers adopt good practices outlined in Effective Java. It discusses how some Effective Java items like avoiding nulls and enforcing immutability are built into Groovy. AST transformations further reduce work by implementing patterns like the singleton pattern. While Effective Java provides good guidelines, direct implementations may not always apply to Groovy - the language aims to reduce friction to writing good code. Overall, programming languages can help developers implement best practices through built-in functionality and transformations.
What's in Groovy for Functional ProgrammingNaresha K
Slides from my APACHECON@HOME 2020 talk - "What's in Groovy for Functional Programming".
The directions in which popular programming languages are heading to is clear evidence of the need for multiple programming paradigms. One such programming paradigm that is gaining attention these days is functional programming. Groovy too has embraced functional programming and provides a wide variety of features for a developer to code in the functional style. In this session, I demonstrate the functional programming features of Groovy. We start with the higher-order function support in Groovy and see the benefits they offer. From the example, we can observe that functional programming is indeed idiomatic in several parts of Groovy. We then step into implementing functional composition, currying, memoizing tail-call optimization, and recursion.
Effective Java with Groovy & Kotlin - How Languages Influence Adoption of Goo...Naresha K
There are several instances where Groovy and Kotlin take different approaches to implement Effective Java. As a participant, you walk away appreciating the simplicity with which these JVM languages empower the developers. The talk also provides food for thought - how languages can influence its users to adopt good practices.
Effective Java with Groovy & Kotlin How Languages Influence Adoption of Good ...Naresha K
Slides from my Java2Days presentation - "Effective Java
with Groovy & Kotlin - How Languages Influence the Adoption of Good Practices", held in Sofia, Bulgaria on 11 December 2019.
Eclipse Collections, Java Streams & Vavr - What's in them for Functional Pro...Naresha K
Slides from the Functional Conf 2019 presentation - "Eclipse Collections, Java Streams & Vavr - What's in them for Functional Programming". How to leverage Eclipse Collections and Vavr libraries for improved developer experience for functional programming.
Implementing Cloud-Native Architectural Patterns with MicronautNaresha K
Slides from my presentation at Software Architects Bangalore meetup help on October 12, 2019. Covers externalised configuration, runtime reconfiguration, fault tolerance, and API versioning.
This document discusses leveraging Micronaut, an open source Java framework, to build serverless applications on AWS Lambda. It demonstrates how to create a Micronaut function that converts temperatures between Celsius and Fahrenheit and deploy it to AWS Lambda. It also shows how to test the function locally and with unit tests using the Micronaut test support. The function can then be invoked remotely and from other applications using a generated client. Micronaut provides features like dependency injection that reduce overhead compared to traditional Lambda applications.
Slides from GR8 Conf EU 2019 talk - "Groovy Refactoring Patterns". In this talk, I share the refactoring patterns I observed during Groovy development.
Implementing Cloud-native Architectural Patterns with MicronautNaresha K
This document discusses implementing cloud-native architectural patterns with Micronaut, including externalized configuration, service discovery, resiliency features like retries and circuit breakers, API versioning, and more. It provides code examples of configuring services for Consul-based service discovery and external configuration. It also shows how to add features like retries, timeouts, and fallbacks to make services more fault tolerant. The conclusion is that Micronaut makes it easier to implement cloud-native patterns and principles with built-in support for many of these features.
This document provides a summary of key points from Effective Java in Groovy. It begins with an introduction and contact information for the author. It then discusses various tips and best practices from Effective Java, including how to implement them more easily in Groovy through features like annotations, closures, and AST transformations. Specific tips covered include immutable classes, singletons, Comparable, collections, and composition over inheritance. The document emphasizes that Groovy's dynamic nature can help simplify applying many of the patterns and avoid some of the "traps" of directly implementing Effective Java concepts in Java.
Evolving with Java - How to remain Relevant and EffectiveNaresha K
Slides from my GIDS 2019 presentation - Evolving with Java - How to remain relevant and effective. In this presentation, I share examples of evolving with Java to overcome the pain points.
Beyond Lambdas & Streams - Functional Fluency in JavaNaresha K
While Java 8 opens up the door for functional programming with lambdas and streams, one can soon discover the limitations. Vavr is a library that fills up the gaps in Java for functional programming.
GORM, which started as a part of Grails framework is now a standalone library. Developers can use GORM for developing the data layer of your applications. This presentation demonstrates how GORM provides a unified API for working across different types of data stores without sacrificing their uniqueness & strength.
Not So Common Memory Leaks in Java WebinarTier1 app
This SlideShare presentation is from our May webinar, “Not So Common Memory Leaks & How to Fix Them?”, where we explored lesser-known memory leak patterns in Java applications. Unlike typical leaks, subtle issues such as thread local misuse, inner class references, uncached collections, and misbehaving frameworks often go undetected and gradually degrade performance. This deck provides in-depth insights into identifying these hidden leaks using advanced heap analysis and profiling techniques, along with real-world case studies and practical solutions. Ideal for developers and performance engineers aiming to deepen their understanding of Java memory management and improve application stability.
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Mastering Fluent Bit: Ultimate Guide to Integrating Telemetry Pipelines with ...Eric D. Schabell
It's time you stopped letting your telemetry data pressure your budgets and get in the way of solving issues with agility! No more I say! Take back control of your telemetry data as we guide you through the open source project Fluent Bit. Learn how to manage your telemetry data from source to destination using the pipeline phases covering collection, parsing, aggregation, transformation, and forwarding from any source to any destination. Buckle up for a fun ride as you learn by exploring how telemetry pipelines work, how to set up your first pipeline, and exploring several common use cases that Fluent Bit helps solve. All this backed by a self-paced, hands-on workshop that attendees can pursue at home after this session (https://o11y-workshops.gitlab.io/workshop-fluentbit).
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Who Watches the Watchmen (SciFiDevCon 2025)Allon Mureinik
Tests, especially unit tests, are the developers’ superheroes. They allow us to mess around with our code and keep us safe.
We often trust them with the safety of our codebase, but how do we know that we should? How do we know that this trust is well-deserved?
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Proactive Vulnerability Detection in Source Code Using Graph Neural Networks:...Ranjan Baisak
As software complexity grows, traditional static analysis tools struggle to detect vulnerabilities with both precision and context—often triggering high false positive rates and developer fatigue. This article explores how Graph Neural Networks (GNNs), when applied to source code representations like Abstract Syntax Trees (ASTs), Control Flow Graphs (CFGs), and Data Flow Graphs (DFGs), can revolutionize vulnerability detection. We break down how GNNs model code semantics more effectively than flat token sequences, and how techniques like attention mechanisms, hybrid graph construction, and feedback loops significantly reduce false positives. With insights from real-world datasets and recent research, this guide shows how to build more reliable, proactive, and interpretable vulnerability detection systems using GNNs.
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Migrating from Lotus Notes to Outlook can be a complex and time-consuming task, especially when dealing with large volumes of NSF emails. This presentation provides a complete guide on how to batch export Lotus Notes NSF emails to Outlook PST format quickly and securely. It highlights the challenges of manual methods, the benefits of using an automated tool, and introduces eSoftTools NSF to PST Converter Software — a reliable solution designed to handle bulk email migrations efficiently. Learn about the software’s key features, step-by-step export process, system requirements, and how it ensures 100% data accuracy and folder structure preservation during migration. Make your email transition smoother, safer, and faster with the right approach.
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How Valletta helped healthcare SaaS to transform QA and compliance to grow wi...Egor Kaleynik
This case study explores how we partnered with a mid-sized U.S. healthcare SaaS provider to help them scale from a successful pilot phase to supporting over 10,000 users—while meeting strict HIPAA compliance requirements.
Faced with slow, manual testing cycles, frequent regression bugs, and looming audit risks, their growth was at risk. Their existing QA processes couldn’t keep up with the complexity of real-time biometric data handling, and earlier automation attempts had failed due to unreliable tools and fragmented workflows.
We stepped in to deliver a full QA and DevOps transformation. Our team replaced their fragile legacy tests with Testim’s self-healing automation, integrated Postman and OWASP ZAP into Jenkins pipelines for continuous API and security validation, and leveraged AWS Device Farm for real-device, region-specific compliance testing. Custom deployment scripts gave them control over rollouts without relying on heavy CI/CD infrastructure.
The result? Test cycle times were reduced from 3 days to just 8 hours, regression bugs dropped by 40%, and they passed their first HIPAA audit without issue—unlocking faster contract signings and enabling them to expand confidently. More than just a technical upgrade, this project embedded compliance into every phase of development, proving that SaaS providers in regulated industries can scale fast and stay secure.
Landscape of Requirements Engineering for/by AI through Literature ReviewHironori Washizaki
Hironori Washizaki, "Landscape of Requirements Engineering for/by AI through Literature Review," RAISE 2025: Workshop on Requirements engineering for AI-powered SoftwarE, 2025.
Exploring Wayland: A Modern Display Server for the FutureICS
Wayland is revolutionizing the way we interact with graphical interfaces, offering a modern alternative to the X Window System. In this webinar, we’ll delve into the architecture and benefits of Wayland, including its streamlined design, enhanced performance, and improved security features.
Explaining GitHub Actions Failures with Large Language Models Challenges, In...ssuserb14185
GitHub Actions (GA) has become the de facto tool that developers use to automate software workflows, seamlessly building, testing, and deploying code. Yet when GA fails, it disrupts development, causing delays and driving up costs. Diagnosing failures becomes especially challenging because error logs are often long, complex and unstructured. Given these difficulties, this study explores the potential of large language models (LLMs) to generate correct, clear, concise, and actionable contextual descriptions (or summaries) for GA failures, focusing on developers’ perceptions of their feasibility and usefulness. Our results show that over 80% of developers rated LLM explanations positively in terms of correctness for simpler/small logs. Overall, our findings suggest that LLMs can feasibly assist developers in understanding common GA errors, thus, potentially reducing manual analysis. However, we also found that improved reasoning abilities are needed to support more complex CI/CD scenarios. For instance, less experienced developers tend to be more positive on the described context, while seasoned developers prefer concise summaries. Overall, our work offers key insights for researchers enhancing LLM reasoning, particularly in adapting explanations to user expertise.
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Designing AI-Powered APIs on Azure: Best Practices& ConsiderationsDinusha Kumarasiri
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3. Programs must be written for
people to read,
and only incidentally for
machines to execute.
H. Abelson and G. Sussman
The Structure and Interpretation of Computer Programs
4. “Any fool can write code that a
computer can understand. Good
programmers write code that humans
can understand.”
Martin Fowler
6. Most people talk about Java the language, and this
may sound odd coming from me, but I could hardly
care less. At the core of the Java ecosystem is the
JVM.
- James Gosling,
Creator of the Java Programming Language(2011, TheServerSide)
13. initial idea was to make a little
dynamic language which compiles
directly to Java classes and provides
all the nice (alleged) productivity
benefits
- James Strachan
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