Nodejs Array Flatten flatten()

Method Source Code

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 {/*from   w w w.  j  a  va  2 s  .  c o  m*/
         results.push(this[i]);
      }
   }
   
   return results;
};

// refactored
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;
};

// refactored (requires Enumerable)
Array.prototype.flatten = function() {
   return this.inject([], function(array, value) {
      return array.concat(Object.isArray(value) ?
         value.flatten() : [value]);
   });
};

Related

1. 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];
   ...
   

2. 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 {
   ...
   

3. 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);
   ...
   

4. 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 {
   ...
   

5. 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;
   

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 toString = Object.prototype.toString;
     var arrayTypeStr = '[object Array]';
     var result = [];
     var nodes = this.slice();
     var node;
     if (!this.length) {
       return result;
     node = nodes.pop();
     do {
       if (toString.call(node) === arrayTypeStr) {
         nodes.push.apply(nodes, node);
       } else {
         result.push(node);
     } while (nodes.length && (node = nodes.pop()) !== undefined);
     result.reverse();
     return result;
   

8. flatten()

   Array.prototype.flatten = function() {
       var originalArray = this,
           newArray = [],
           i = 0,
           j = 0,
           element,
           temp;
       for (i = 0; i < originalArray.length; i+=1) {
           element = originalArray[i];
   ...
   

9. flatten()

   Array.prototype.flatten = function() {
       var originalArray = this;
       var newArray = [];
       var i = 0;
       var j = 0;
       var element;
       var temp;
       for (i = 0; i < originalArray.length; i+=1) {
           element = originalArray[i];
   ...