Nodejs Array Flatten flattenArray()

Method Source Code

var arrays = [[1, 2, 3], [4, 5], [6]];

Array.prototype.flattenArray = function() 
{
   //from www . ja  va  2s .c  o  m
   // arrays.reduce(function(i,j)   {return i.concat(j);} ,[]);
         arrays.reduce(function(previousValue, currentValue, index, array) 
            {
           console.log(previousValue+"---"+currentValue);
           return previousValue.concat(previousValue);
         });

   }


console.log(arrays.flattenArray);

Related

1. flatten(prevous)

   Array.prototype.flatten = function(prevous) {
     var flattenedArr = prevous || [];
     for (var i = 0; i < this.length; i++) {
       if(Array.isArray(this[i])) {
         this[i].flatten(flattenedArr);
       } else if(this[i] === null) {
       } else {
         flattenedArr.push(this[i]);
     return flattenedArr;
   

2. flattenArray()

   function flattenArray(a, b) {
     return a.concat(b);
   Array.prototype.flattenArray = function() {
     return this.reduce(flattenArray);
   var arrays = [[1, 2, 3], [4, 5], [6]];
   console.log(arrays.flattenArray());
   

3. flattenArray()

   Array.prototype.flattenArray = function() {
     var flatArray = arrays.reduce(function(a, b) {
     return a.concat(b);
   }, []);
   console.log(flatArray);
   return "";
   var arrays = [[1, 2, 3], [4, 5], [6]];
   console.log(arrays.flattenArray())
   ...
   

4. flattenArray()

   Array.prototype.flattenArray = function()
     var rescultArray=[];
       this.reduce(function(pre, cur,index) 
         rescultArray=index==1?rescultArray.concat(pre,cur):rescultArray.concat(cur);
        });
      return rescultArray;
   var arrays = [[1, 2, 3], [4, 5], [6]];  
   console.log(arrays.flattenArray());
   

5. flattenArray()

   Array.prototype.flattenArray =  function (){
     var array = this.reduce(function(a, b) {return a.concat(b);}, []);
     return array;
   var arrays = [[2, 3, 4], [1, 2], [2]];
   console.log( arrays.flattenArray() );
   

6. flattenInPlace()

   Array.fill = function(count, generator){
     var a = new Array(count)
     for(var i=0; i<count; i++){
       a[i] = generator(i)
     return a
   function isDefined(a){
     return (a !== null) && (a !== undefined)
   ...