Nodejs Array Flatten flatten()

Method Source Code

var array;/*w w w.  j a v  a 2 s  . c  o m*/

Array.prototype.flatten = function () {
    'use strict';

    var resultArray = [];

    function getValues(array) {
        var i,
            value;

        for (i = 0; i < array.length; i += 1) {
            value = array[i];

            if (Array.isArray(value)) {
                getValues(value);
            } else {
                resultArray.push(value);
            }
        }
    }

    getValues(this);

    return resultArray;
};

array = [1, 2, 3, 4];
console.log(array.flatten());

array = [1, 2, [3, 4], [5, 6]];
console.log(array.flatten());
console.log(array); // Not changed

array = [0, ["string", "values"], 5.5, [[1, 2, true], [3, 4, false]], 10];
console.log(array.flatten());

Related

1. flatten()

   Array.prototype.flatten = function () {
       var result = [];
       function flatten(elements, output) {
           elements.forEach(function (element) {
               if (!(typeof element === 'object' || typeof element === typeof Array)) {
                   output.push(element);
               else {
                   flatten(element, output);
   ...
   

2. flatten()

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

3. flatten()

   Array.prototype.flatten = function() {
       var resultArray = [];
       function getValues(array) {
           var i;
           for (i = 0; i < array.length; i += 1) {
               var value = array[i];
               if (Array.isArray(value)) {
                   getValues(value);
               } else {
   ...
   

4. flatten()

   Array.prototype.flatten = function () {
       var thisArr = this;
       var newArr  = [];
       recursive(thisArr);
       function recursive (arr) {
           for (var i = 0; i < arr.length; i++) {
               if (arr[i] instanceof Array) {
                   recursive(arr[i]);
               } else {
   ...
   

5. flatten()

   "use strict";
   Array.prototype.flatten = function () {
       var result = [];
       function getValues(array) {
           var i;
           for (i = 0; i < array.length; i++) {
               var value = array[i];
               if (Array.isArray(value)) {
                   getValues(value);
   ...
   

6. flatten()

   Array.prototype.flatten = function() {
       var resultArray = [];
       function getValues(array) {
           var i;
           for (i = 0; i < array.length; i += 1) {
               var value = array[i];
               if (Array.isArray(value)) {
                   getValues(value);
               } else {
   ...
   

7. flatten()

   Array.prototype.flatten = function () {
       var arrayResult = [];
       flatten(this);
       function flatten(array) {
           var length = array.length;
           for (var i = 0; i < length; i++) {
               var element = array[i];
               if (Array.isArray(element)) {
                   flatten(element);
   ...
   

8. flatten()

   Array.prototype.flatten = function() {
       var flatten = function(items) {
           var flattened = [];
           items.forEach(function(item) {
               if (typeof item === "object") {
                   flatten(item).forEach(function (i) {
                       flattened.push(i);
                   });
               } else {
   ...
   

9. flatten()

   Array.prototype.flatten = function(){
     var flat_array = [];
     for(var i = 0; i < this.length; i++){
       if (this[i].constructor == Array){
         this[i] = this[i].flatten();
         flat_array = flat_array.concat(this[i]);
       else { flat_array.push(this[i]); }
     return flat_array;