4loop

Keep your for loop syntax the same for all different types. Just pass in your constraints and callback and we will determine best course of action. If you pass in anything with a value(obj, map, arr), you will always get that returned first otherwise it will be the iterator or key. Please see examples below

Install

$ npm install 4loop

Use

const fourLoop = require('4loop');

const obj = { foo: 'bar', baz: 'cat' };
const arr = ['foo', 'bar', 'baz', 'cat'];
const arrLength = arr.length;
const mySet = new Set(['foo', 'bar', { baz: 'cats' }]);
const myMap = new Map([['foo', 'bar'], ['baz', 'cats'], ['dogs', undefined]]);

fourLoop(obj, (value, key, iterator) => {
    // Do magic here
    if (iterator === 1) {
        console.log(value, key, iterator); // Prints cat, baz, 1
    }
});

fourLoop(arr, (value, key, iterator) => {
    // Do magic here
    if (iterator === 1) {
        console.log(value, key, iterator); // Prints bar, bar, 1
    }
});

fourLoop(arrLength, (value, key, iterator) => {
    // Do magic here
    if (iterator === 1) {
        console.log(value, key, iterator); // Prints 1, 1, 1
    }
});

fourLoop(mySet, (value, key, iterator) => {
    // Do magic here
    if (iterator === 1) {
        console.log(value, key, iterator); // Prints bar, bar, 1
    }
});

fourLoop(myMap, (value, key, iterator) => {
    // Do magic here
    if (iterator === 1) {
        console.log(value, key, iterator); // Prints cats, baz, 1
    }
});

Developing and contributing to 4loop

Folder structure

The main body of code is in index.js.

The tests are in the test/spec directory. Please follow naming convention with xxxx.spec.js

Running tests

We use Feather-test which is similar to jasmine for unit tests. Unless there is a very compelling reason to use something different, please continue using Feather for tests. The existing tests are in the spec folder. Here are some useful command shortcuts:

Run all the tests:

npm test

Run only some tests:

npm test --run=nameOfFile

Before submitting a pull request

Please make sure all code supports all versions of node.

We use ESLint for syntax consistency, and the linting rules are included in this repository. Running npm test will check the linting rules as well. Please make sure your code has no linting errors before submitting a pull request.

eslint . --fix will also automatically fix any linting errors.

License

MIT