Maintainability SFJS Sept 4 2014

Sep 5, 20142 likes1,597 views

The document discusses achieving maintainability in code through examining code quality with linters, generating visual reports on metrics like complexity and coverage, and automating processes like builds, linting, and testing through tools like Grunt and Gulp. It emphasizes setting limits on metrics like complexity, enforcing code style through automation, and treating documentation as important as code.

Achieving
Maintainability
Jarrod Overson - @jsoverson

We do stuff like…
❯ pi
3.141592653589793
❯ pi(2)
6.283185307179586

Or…
❯ 4..days
345600000
❯ 60..seconds
60000

How much analysis do you run on your code?

KNOW YOUR LINTERS
JSHINT
ESLINT
JSCS
Community-driven JSLint fork. High configurability.
JSHint alternative. High configurability.
Code style checker. Separate and complementary.
WHAT ABOUT JSLINT AND CLOSURE LINTER?

SET LIMITS
"maxparams" : 4
"maxdepth" : 4
"maxstatements" : 20
"maxlen" : 100
"maxcomplexity" : 7

TECHNICALLY
CYCLOMATIC COMPLEXITY
IS THE NUMBER OF PATHS
THROUGH YOUR CODE

PRACTICALLY
CYCLOMATIC COMPLEXITY
IS HOW HARD
YOUR CODE IS TO TEST

function main(a) {
if (a > 5) {
}
}
COMPLEXITY : 2

function main(a) {
if (a > 5) {
!
} else {
!
}
}
COMPLEXITY : ?

function main(a) {
if (a > 10) {
!
} else if(a > 5) {
!
}
}
COMPLEXITY : 3

function main(a) {
if (a > 5) {
if (a > 10) {
!
}
}
}
COMPLEXITY : 3

function main(a) {
if (a) {
} else if (a) {
}
!
if (other) { }
!
for (var i = 0; i < a; i++) {
if (i % 2) {
} else if (i % 3) {
}
}
}
COMPLEXITY : 7

plato
complexity
lint errors
maintainability

MAINTAINABILITY?
fn(averageEffort, averageComplexity, averageLines);
fn(difficulty, volume)
fn(length, vocabulary)
fn(uniqueOperators, totalOperands, uniqueOperands)
fn(totalOperators, totalOperands)
fn(uniqueOperators, uniqueOperands)

IF IT’S NOT AUTOMATIC
It won’t get done every time.

IF IT’S NOT VISIBLE
It may as well not be done at all.

Build first
Before you write code, set up your build

Look into yeoman
Manages file copies, conflicts, prompts, defaults

$ npm install yo generator-generator
!
$ mkdir generator-myWorkflow
!
$ cd generator-myWorkflow
!
$ yo generator

Delete, add, and modify
It’s surprisingly easy.

Grunt vs Gulp
it doesn’t matter, just choose one.

What about…
• MAKE
• RAKE
• JAKE
• ANT
• BROCCOLI
• blahhhh…

It doesn’t matter.
Just choose one.
( but be ready to support it )

Want code coverage?
grunt-contrib-jasmine
grunt-mocha-istanbul
grunt-jscoverage
and 30 more

Want linting?
grunt-contrib-jshint
grunt-eslint
grunt-jscs-checker
and 50 more

Want docs?
grunt-contrib-yuidoc
grunt-jsdoc
grunt-docco
and 90+ more

‣ Code style
‣ Metrics
‣ Build tools
‣ Data formats
‣ Naming conventions
‣ Curly Braces
‣ Directory structure
‣ Everything
ENFORCE
‣ Automate Everything
‣ VCS hooks
‣ CI
‣ Code reviews
‣ Reports
‣ Everything
‣ Warnings === errors
‣ Make it hard to be
wrong
DOCUMENT
‣ Treat docs as code
‣ Make it
‣ easy to find
‣ easy to read
‣ easy to update
‣ easy to discuss
‣ Use github!
AGREE
GET EVERYONE TOGETHER

Your automation choice needs to
accommodate enforcement

Recap
your analysis
your enforcement
your everything
Automate
Automate
Automate

Interested in why a security hardware startup attracted
so many JavaScript developers? Come talk to us!
esprima
venus
plato
grunt-contrib

1) The document discusses achieving maintainability in code through analysis, automation, and enforcement of standards. 2) It recommends setting up linting, code coverage, and other analysis tools to examine code quality and automatically enforcing code style through build processes. 3) The key is to automate as many processes as possible like testing, linting, and documentation to make the code easy to work with and prevent issues from being introduced.

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Join this UiPath Community Berlin meetup to explore the Orchestrator API, Swagger interface, and the Test Manager API. Learn how to leverage these tools to streamline automation, enhance testing, and integrate more efficiently with UiPath. Perfect for developers, testers, and automation enthusiasts! 📕 Agenda Welcome & Introductions Orchestrator API Overview Exploring the Swagger Interface Test Manager API Highlights Streamlining Automation & Testing with APIs (Demo) Q&A and Open Discussion Perfect for developers, testers, and automation enthusiasts! 👉 Join our UiPath Community Berlin chapter: https://community.uipath.com/berlin/ This session streamed live on April 29, 2025, 18:00 CET. Check out all our upcoming UiPath Community sessions at https://community.uipath.com/events/.

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