More declarative and convenient functions than in Array.prototype
npm install fp-arrayfp-array is a group of functions to do declarative programming in a more convenient way than in Array.prototype
$ npm install fp-array``javascript
const map = require('fp-array').map
const filter = require('fp-array').filter
const reduce = require('fp-array').reduce
const arr = [...]
map(arr)
.with(callback)
[.and(callback2)]
[...]
.result()
filter(arr)
.is(callback)
[.and(callback2)]
[...]
.result()
reduce(arr, callback[, initialValue])
`
javascript
const arr = [1, 2, 3]
// callbacks
const increment = n => n + 1
const double = n => n * 2map(arr)
.with(increment)
.and(double)
.and(String)
.result() // ['4', '6', '8']
arr // [1, 2, 3]
`
#### Notes
- Iterates only one time over
- Inmutable: has not mutated, a new Array is returned when result()
- Declarative: Easy to read syntax####
javascript
const arr = [1, 'a', true, 6, 0, 4, undefined, 10]const number = n => typeof n === 'number'
const greaterThan4 = n => n > 4
const even = n => n % 2 === 0
filter(arr)
.is(number)
.and(even)
.and(greaterThan4)
.result() // [6, 10]
arr // [1, 'a', true, 6, 0, 4, undefined, 10]
`
Same notes than before applies.####
javascript
const arr = [1, 2, 3]
reduce(
arr,
(acc, currentValue) => acc + currentValue,
5
) // 11
`
works exactly like the original except now is outside the Array.prototype` More examples in tests.
#### Have any idea ?
Open an issue or say hi on twitter: @juliomatcom
#### MIT Licensed
Copyright (c) 2016 Julio César Martín