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@tbekaert
Last active March 1, 2018 07:33
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Collection of js utils
/**
* Concat arrays
*
* @params {array} arrs - List of arrays
* @example
* import { concatArrays } from "path/to/array.js"
*
* let arr1 = [1, 2, 3];
* let arr2 = [4, 5, 6];
*
* concatArrays(arr1, arr2, [7, 8, 9, 2, 4]);
* // Return [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ]
*/
export let concatArrays = (...arrs) => [].concat(...arrs);
/**
* Remove duplicates from simple arrays
*
* @params {array} arrs - List of arrays
* @example
* import { uniqueArray } from "path/to/array.js"
*
* uniqueArray([ 1, 2, 3, 4, 5, 6, 7, 8, 9, 2, 4 ]);
* // Return [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ]
*/
export let uniqueArray = arr => [...new Set(arr)];
/**
* Remove duplicates objects in array base on an object key
*
* @params {string} p - Key to look for in each object
* @params {array} arr - Array
* @example
* import { unitArrayObjects } from "path/to/array.js"
*
* let arr = [
* { id: 6, username: 'lorem' },
* { id: 8, username: 'ipsum' },
* { id: 6, username: 'lorem' },
* { id: 7, username: 'dolor' }
* ];
*
* uniqueArrayObjects('id', arr);
* //
* Return :
* [
* { id: 6, username: 'lorem' },
* { id: 8, username: 'ipsum' },
* { id: 7, username: 'dolor' }
* ]
*/
export let uniqueArrayObjects = (p, arr) => arr.reduce((a, b) => !a.filter(c => b[p] === c[p]).length ? [...a, b] : a, []);
/**
* Remove duplicates objects in array with deep comparison
*
* @params {array} arr - Array
* @example
* import { unitArrayObjectsDeep } from "path/to/array.js"
*
* let arr = [
* { id: 6, username: 'lorem' },
* { id: 8, username: 'ipsum' },
* { id: 6, username: 'dolor' },
* { id: 7, username: 'sit' },
* { id: 8, username: 'ipsum' },
* ];
*
* uniqueArrayObjectsDeep('id', arr);
* //
* Return :
* [
* { id: 6, username: 'lorem' },
* { id: 8, username: 'ipsum' },
* { id: 6, username: 'dolor' },
* { id: 7, username: 'sit' }
* ]
*/
export let uniqueArrayObjectsDeep = arr => uniqueArray( arr.map(a => JSON.stringify(a)) ).map(a => JSON.parse(a));
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