Nodejs Array Flatten flaten()

Method Source Code

'use strict';/*ww w. j  a  v  a2s  .  c o m*/

// TASK 03
var array = [1, 2, 3, 4];
var array = [1, 2, [3, 4],
    [5, 6]
];

var array = [0, ["string", "values"], 5.5, [
    [1, 2, true],
    [3, 4, false]
], 10];

Array.prototype.flaten = function() {
    var flatenArray = [];

    var extractArray = function(arr) {
        if (arr.constructor === Array) {
            for (var i = 0; i < arr.length; i += 1) {
                extractArray(arr[i]);
            }
        } else {
            flatenArray.push(arr);
        }

        return flatenArray;
    }

    return extractArray(this);
}

// TESTS

// console.log(array); // ORIGINAL ARRAY IS NOT TOUCHED
console.log(array.flaten());

Related

1. flat()

   Array.prototype.flat = function() {
     return this.reduce(function(a, b) {
       return a.concat(b);
     }, []);
   };
   var range = function(n) {
     var ret = [];
     for (var i = 0; i < n; i++) {
       ret.push(i);
   ...
   

2. flatten()

   Array.prototype.flatten = function() {
       return this.reduce(function (a, b) { return a.concat(b instanceof Array ? b.flatten() : b); }, []);
   };
   

3. flatten()

   Array.prototype.flatten = function () {
     var flattened = Array.prototype.concat.apply([], this);
     if (flattened.length == this.length) return flattened;
     else return flattened.flatten();
   

4. flatten()

   Array.prototype.flatten = function() {
       return Array.prototype.concat.apply([], this);
   };
   

5. flatten()

   Array.prototype.flatten = function() {
       "use strict";
       var flattened = [];
       flattened.concat.apply(flattened, this);
   };