Nodejs Array Concatenate concatAll()

Method Source Code

//  Create an Array concatAll method

let exchanges = [//from  w  w w.j  av a  2 s  . c  o  m
  [
    { 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 },
  ],
];

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

let stocks = exchanges.concatAll();

stocks.forEach(stock => console.log(stock.symbol)); 
/* =>
XFX
TNZ
JXJ
NYN
*/

Related

1. concatAll()

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

2. concatAll()

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

3. concatAll()

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

4. concatAll()

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

5. concatAll()

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

6. 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}
       ]
   ...
   

7. concatAll()

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

8. concatAll()

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

9. 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},
     ],
   ...