Nodejs Array Concatenate concatAll()

Method Source Code

/*/*from  w w w  .j  a  v a  2 s. co  m*/
Let's add a concatAll() function to the Array type. The concatAll() function
 iterates over each sub-array in the array and collects the results in a new,
  flat array. Notice that the concatAll() function expects each item in the
   array to be another array.
*/

Array.prototype.concatAll = function() {
   var results = [];
   this.forEach(function(subArray) {
      results.push.apply(results, subArray);
   });

   return results;
};

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

Related

1. concatAll()

   let data = [
       [
           {name: "IBM", price:12},
           {name: "Apple", price:120}        
       ],
       [
           {name: "Google", price:100},
           {name: "MorganStanley", price:30}        
       ]
   ...
   

2. concatAll()

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

3. concatAll()

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

4. concatAll()

   let exchanges = [
     [
       { symbol: 'XFX', price: 240.22, volume: 23432 },
       { symbol: 'TNZ', price: 332.19, volume: 234 },
     ],
     [
       { symbol: 'JXJ', price: 120.22, volume: 5323 },
       { symbol: 'NYN', price: 88.47, volume: 98275 },
     ],
   ...
   

5. concatAll()

   var exchanges = [
       [
           {symbol: "XFZ", price: 340.22, volume: 202373},
           {symbol: "ABC", price: 521.19, volume: 737323}
       ],
       [
            {symbol: "DEF", price: 987.82, volume: 2373},
            {symbol: "HIJ", price: 200.82, volume: 373}
       ]
   ...
   

6. concatAll()

   Array.prototype.concatAll = function() {
     var results = [];
     this.forEach( subArray => {
       subArray.forEach(elt => results.push(elt));
     });
     return results;
   };
   

7. concatAll()

   const exchanges= [
     [
       {symbol: 'XFX', price: 240.22, volume: 23432},
       {symbol: 'TNZ', price: 332.19, volume: 234},
     ],
     [
       {symbol: 'JXJ', price: 120.22, volume: 5323},
       {symbol: 'NYN', price: 88.47, volume: 98275},
     ],
   ...
   

8. concatAll()

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

9. concatAll()

   Array.prototype.concatAll = function() {
     var results = [];
     this.forEach(function(subArray) {
       results.push.apply(results, subArray);
     });
     return results;
   };