Nodejs Array Merge All mergeAll()

Method Source Code

Array.prototype.mergeAll = function() {
    var results = [];
    this.forEach(function(subArray) {
        // ------------   INSERT CODE HERE!  ----------------------------
        // Add all the items in each subArray to the results array.
        // ------------   INSERT CODE HERE!  ----------------------------
     subArray.forEach(function(element) {
        results.push(element);/*from w  w  w .ja  va  2 s  .  c o m*/
     });
    });
    
    return results;
};

// JSON.stringify([ [1,2,3], [4,5,6], [7,8,9] ].mergeAll()) === "[1,2,3,4,5,6,7,8,9]"
// [1,2,3].mergeAll(); // throws an error because this is a one-dimensional array

Related

1. mergeAll()

   var school = [
     [1, 2, 3],
     [4, 5, 6, 7, 8, 3],
     [5, 3, 5]
   ];
   Array.prototype.mergeAll = function() {
     var result = [];
     this.forEach(function(subArray) {
       result.push.apply(result, subArray);
   ...
   

2. mergeAll()

   Array.prototype.mergeAll = function() {
     var results = [];
     this.forEach(function(subArray) {
       subArray.forEach(function(number) {
         results.push(number);
       });
     });
     return results;
   };
   ...
   

3. mergeAll()

   Array.prototype.mergeAll = function() {
       var results = [];
       this.forEach(function(subArray) {
         subArray.forEach(function(itemInArray) {
           results.push(itemInArray);
         });
       });
       return results;
   };
   ...
   

4. mergeAll()

   Array.prototype.mergeAll = function(){
     var result = [];
     this.forEach(function(subArray){
       subArray.forEach(function(item){
         result.push(item);
       })
     })
     return result;
   

5. mergeAll()

   Array.prototype.mergeAll = function(){
     var result = [];
     this.forEach(function(subArray){
       subArray.forEach(function(item){
         result.push(item);
       })
     })
     return result;
   var a = [[1,2],[3,4]];
   a.mergeAll();