Code Brevity in Scala
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In this video, senior software developer Alejandro Lujan explores the elements of Scala's language that allow you to write clean and powerful code in a more brief manner.
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Variables 2Jesus Obenita Jr. Here is the JavaScript code to solve the problem:
<script>
// Get the grades from the prompt
var grade1 = parseInt(prompt("Enter grade 1"));
var grade2 = parseInt(prompt("Enter grade 2"));
var grade3 = parseInt(prompt("Enter grade 3"));
var grade4 = parseInt(prompt("Enter grade 4"));
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// Calculate the final grade
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// Display the final grade
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Graph
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lecture 18
lecture 18sajinsc The document discusses the algorithms of breadth-first search (BFS) and depth-first search (DFS) on graphs. It provides pseudocode for BFS and DFS, and examples of running the algorithms on sample graphs. Key points include:
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- DFS uses recursion to explore as deep as possible before backtracking. It identifies tree edges, back edges, and forward edges.
- Both BFS and DFS run in O(V+E) time on a graph with V vertices and E edges.
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130210107039 2130702Ketaki_Pattani The document defines and explains several key graph concepts and algorithms, including:
- Graph representations like adjacency matrix and adjacency list.
- Graph traversal algorithms like breadth-first search (BFS) and depth-first search (DFS).
- Minimum spanning tree algorithms like Prim's algorithm.
- Single-source shortest path algorithms like Dijkstra's algorithm and Floyd's algorithm.
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Depth first search [dfs]![Depth first search [dfs]](https://cdn.slidesharecdn.com/ss_thumbnails/depthfirstsearchdfs-190926145304-thumbnail.jpg?width=560&fit=bounds)
Depth first search [dfs]DEEPIKA T Depth-first search (DFS) is an algorithm that explores all the vertices reachable from a starting vertex by traversing edges in a depth-first manner. DFS uses a stack data structure to keep track of vertices to visit. It colors vertices white, gray, and black to indicate their status. DFS runs in O(V+E) time and can be used for applications like topological sorting and finding strongly connected components. The edges discovered during DFS can be classified as tree, back, forward, or cross edges based on the order in which vertices are discovered.
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2) Strongly connected components are maximal subsets of vertices in a directed graph such that there is a path between every pair of vertices. An algorithm uses depth-first search to find SCCs in linear time.
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Data structuresumit singh - A topological sort is an ordering of the vertices in a directed acyclic graph. The ordering is such that for every directed edge from vertex vi to vj, vi comes before vj in the ordering. A topological sort is not possible if the graph contains a cycle.
- The topological sort algorithm finds vertices with no incoming edges and adds them to the ordering. It then removes these vertices and repeats until the graph is empty or a cycle is detected.
- The example graph shows the in-degrees of vertices in a graph. Vertex A has an in-degree of 0 and would be first in the topological sort ordering.
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Depth-First SearchMd. Shafiuzzaman Hira This document discusses depth-first search (DFS), a graph search algorithm that explores edges deeper whenever possible. It uses a LIFO queue and colors vertices as white, gray, or black to track the search process. DFS recursively visits unexplored neighbor vertices, coloring them gray before exploring their edges. The running time is O(V+E) as DFS calls itself once per vertex and explores each edge once.
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- Pseudocode and a Java program implementing BFS.
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2) BFS uses a queue to keep track of nodes to visit at each level, processing nodes level-by-level from the queue in a FIFO order. It marks visited nodes to avoid processing them again.
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1- Create a class called Point that has two instance variables, defi.pdf
1- Create a class called Point that has two instance variables, defi.pdfjeeteshmalani1 1- Create a class called Point that has two instance variables, defined as private, as follows: An x
coordinate and a y coordinate of type integer.
a) Write two constructors for the Point class as follows: A default constructor that sets the class
instance variables to zero and a constructor that receives two integer values and sets the instance
variables to them.
b) Write the set and get methods for the Point class to set and return the values of its instance
variables.
c) Write a toString() method for the Point class that prints the class name (Point) and the value of
its instance variables.
2- Create three classes called Circle, Rectangle and Square with the following properties:
- The Circle class has two instance variables – a position of type Point (the class that you just
created above) and a radius of type double. The instance variables position and radius specify the
position of the center and radius of the circle, respectively.
- The Rectangle class has three instance variables – a position of type Point (the class that you
just created above), a length and a width of type double. The instance variables position, length
and width specify the position of the top left corner, length and width of the rectangle,
respectively.
- The Square class has two instance variables – a position of type Point (the class that you just
created above) and a lengthof type double. The instance variables position andlength specify the
position of the top left corner and length of the square, respectively.
For each of the Circle, Rectangle andSquare classes do the following:
a) Define the instance variables as private.
b) Write two constructors for each class as follows: A default constructor that sets the instance
variables to zero and a constructor that receives values for the instance variables and sets them.
c) Write the set and get methods for each class to set and return the values of their instance
variables. For example, one of the get methods would return a Point.
d) Write a toString() method for each class that prints the class name (Circle, Rectangle or
Square) and the value of its instance variables.
e) Write two methods called getPerimeter() and getArea() for each class, which calculate and
return the perimeter and area of the class, respectively. For example, the getArea() method of the
Square class returns the area of the Square object.
3- Test the above classes by writing a class called GeometricTest.java that does the following:
- Creates instances of the Circle, Rectangle and Square classes as follows:
- Circle: positioned at x = 7, y = 3 and the radius = 4.5.
- Rectangle: positioned at x = 3, y = -1 and the length = 4.0 and width = 6.0.
- Square: positioned at x = 5, y = 8 and the length = 2.0.
- Prints each of the above objects.
- Changes the length of the Square object to 5.0.
- Prints the perimeter and area of each of each of the above objects.
- Compares the x coordinates of the Square and Rectangle classes and prints a message
spec.
Ti1220 Lecture 2: Names, Bindings, and Scopes
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- Names (identifiers) in programming languages and their forms
- Variables, their attributes like name, address, value, type, lifetime, and scope
- Binding and binding time, including static and dynamic binding
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oop Lecture 5
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Howard type script
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TypeScript by Howard
TypeScript by HowardLearningTech TypeScript provides basic types like Boolean, Number, String, Array, Enum, Any, and Void to define the type of a variable. It allows defining interfaces to describe the shape of an object and ensure variables match the expected structure. Classes can be created that implement interfaces, support inheritance, and use public/private modifiers. Accessors can be used to control read/write access to class properties. Static properties exist on the class level rather than instance level. Classes can also be defined using constructor functions for additional flexibility.
Type script by Howard
Type script by HowardLearningTech The document discusses TypeScript modules. It begins by showing how to organize validators into a single file module. It then demonstrates splitting the module across multiple files by creating LettersOnlyValidator.ts and ZipCodeValidator.ts files that both reference a Validation.ts file and export classes that implement the module's interface. This allows validators to be modularized while splitting code across separate files.
All Aboard The Scala-to-PureScript Express!
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ハイブリッド言語Scalaを使う
ハイブリッド言語Scalaを使うbpstudy The document discusses Scala programming concepts including object-oriented programming, functional programming, collections, pattern matching, and more. It provides code examples of defining objects and classes, functions, for expressions, match expressions, case classes, traits, generics, and collections like List and Map.
Function recap
Function recapalish sha 1. A function is a section of code that performs a specific task and makes programming simpler by splitting problems into sub-problems.
2. There are different types of functions including void functions without arguments, void functions with input arguments, and functions that return a single result.
3. Functions allow code to be reused by calling the function from the main program or from other functions. Functions can take input arguments and return values to provide modularity and simplify programming.
Function recap
Function recapalish sha 1. A function is a section of code that performs a specific task and makes programming simpler by splitting problems into sub-problems.
2. There are different types of functions including void functions without arguments, void functions with input arguments, and functions that return a single result.
3. Functions allow code to be reused by calling the function from the main program or from other functions. Functions can take input arguments and return values to provide modularity and simplify programming.
RxSwift 시작하기
RxSwift 시작하기Suyeol Jeon The document discusses RxSwift, which is a library for reactive programming with Swift. It combines ReactiveX with Swift by providing Observables and Observers. Observables allow data streams to be observed and manipulated through operators like map, filter, etc. The document provides examples of using RxSwift to validate a password field by observing text changes and mapping valid/invalid states to display feedback. It also shows an example of observing a nickname field to call an API on valid input. Overall, the document introduces the key concepts of RxSwift like Observables, Observers, operators, and provides examples of validating user input fields reactively.
Arrays
ArraysAnaraAlam An array is a collection of data that holds a fixed number of values of the same type. Arrays can be one-dimensional or multidimensional. Array elements are accessed using indices starting from 0. Arrays can be passed to functions by passing the array name, which passes the base address. Strings in C are implemented as character arrays terminated by a null character. Common string functions like strcpy(), strcat(), strlen() etc. are used to manipulate strings.
Oop objects_classes
Oop objects_classessidra tauseef The document discusses various concepts related to objects and classes in C++ including copy constructors, shallow vs deep copy, customizing copy constructors, immutable objects, static vs instance members, friend functions and classes, const member functions and objects, and the difference between structs and classes. Specifically, it provides examples to illustrate deep copying of objects containing dynamic memory, implementing copy constructors for deep copy, using static member functions and data, allowing access to private members using friend functions and classes, and ensuring objects are immutable using const.
C++ classes tutorials
C++ classes tutorialskailash454 This document discusses C++ classes and object-oriented programming. It defines classes as user-defined types that encapsulate data and functions. Classes allow programmers to model real-world entities as objects with attributes and behaviors. The document provides examples of class definitions, member access specifiers, constructors, member functions, and accessing class members. It demonstrates how classes are used to define objects and encapsulate data in C++.
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05-OOP-Abstract Classes____________.pptxpaautomation11 Class extension should be used deliberately, not just to add fields and methods incrementally. When defining classes through extension, it is important to consider type compatibility. In the example of LatLong subclasses, type compatibility is maintained by defining a common interface (LatLong) that the subclasses extend while adding their own fields. This allows methods like bearing calculation to work across any object of a LatLong subclass type.
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- 2. Class defini4ons class Product( val name: String, val description: String, val category: Category)
- 3. Implicit return def area(radius: Double ): Double = { val pi: Double = 3.14; val sqRad: Double = radius * radius; return pi * sqRad; }
- 4. Implicit return def area(radius: Double ): Double = { val pi: Double = 3.14; val sqRad: Double = radius * radius; pi * sqRad; }
- 5. Type inference def area(radius: Double ): Double = { val pi: Double = 3.14; val sqRad: Double = radius * radius; pi * sqRad; }
- 6. Type inference def area(radius: Double ): Double = { val pi = 3.14; val sqRad = radius * radius; pi * sqRad; }
- 7. Type inference def area(radius: Double ) = { val pi = 3.14; val sqRad = radius * radius; pi * sqRad; }
- 8. Semicolons def area(radius: Double ) = { val pi = 3.14; val sqRad = radius * radius; pi * sqRad; }
- 9. Semicolons def area(radius: Double ) = { val pi = 3.14 val sqRad = radius * radius pi * sqRad }
- 10. Braces are op4onal def area(radius: Double ) = 3.14 * radius * radius
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