Underline NPM | npm.io

Underline.js - Underscore.js for modern Javascript

Using modern ES7 functional bind :: syntax you can now call the underscore.js function the 'right' or non-functional way. underline.js is a thin layer between your code and underscore.js which binds all underscore functions called to the target object.

Example

import { difference, all, keys, pluck } from 'underline'; // Require functions needed

// Differece of arrays
[12, 1, 2, 3, 10, 11]::difference([10, 11, 12])
// => [1, 2, 3]

// Check for all elements are less than 10
[1, 2, 3, 10]::all((e) => e < 10)
// => false

// Extract Keys
{ a: 1, b: 2 }::keys()
// => ["a", "b"]

// Pluck property
[
  {name: 'moe', age: 40},
  {name: 'larry', age: 50},
  {name: 'curly', age: 60}
]::pluck('name')
// => ["moe", "larry", "curly"]

/////
// VS
/////

// Underscore way for difference
_.difference([12, 1, 2, 3, 10, 11], [10, 11, 12])

// all
_.all([1, 2, 3, 10], (e) => e < 10)

// keys
_.keys({ a: 1, b: 2})
// OR
Object.keys({ a: 1, b: 2})

// and pluck
_.pluck([
  {name: 'moe', age: 40},
  {name: 'larry', age: 50},
  {name: 'curly', age: 60}
], 'name')

Underline supports chaining without wrapping like underscore

// Chaining difference and all
[12, 1, 2, 3, 10, 11]::difference([10, 11, 12])
                     ::all((e) => e < 10)
// => true

/////
// VS
/////

// Too much typing to chain in underscore and get its value
_.chain([12, 1, 2, 3, 10, 11]).difference([10, 11, 12])
                              .all((e) => e < 10)
                              .value()