Nodejs Array Flatten flatten()

Method Source Code

Array.prototype.flatten = function () {
    var arrayResult = [];
    flatten(this);//from w  w w  .  jav a2s. c  om

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

            arrayResult.push(element);
        }
    }

    return arrayResult;
};

var array;
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 = [undefined, 0, ['string', 'values'], 5.5, [[1, 2, true], [3, 4, false]], 10, {}, null, ' '];
console.log(array.flatten());

Related

1. 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 {
   ...
   

2. 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 {
   ...
   

3. 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);
   ...
   

4. flatten()

   var array;
   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];
   ...
   

5. 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 {
   ...
   

6. 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 {
   ...
   

7. 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;
   

8. flatten()

   Array.prototype.flatten = function() {
     var results = [];
     for (var i = 0, len = this.length; i < len; i++) {
       if (typeof this[i] == "object" && this[i].constructor === Array) {
         results = results.concat(this[i].flatten());
       } else {
         results.push(this[i]);
     return results;
   };
   Array.prototype.flatten = function() {
     var results = [];
     for (var i = 0, len = this.length; i < len; i++) {
       results = results.concat(Object.isArray(this[i]) ? this[i].flatten() : [this[i]]);
     return results;
   };
   Array.prototype.flatten = function() {
     return this.inject([], function(array, value) {
       return array.concat(Object.isArray(value) ?
         value.flatten() : [value]);
     });
   };
   

9. 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 {
   ...