Nodejs Array Concatenate concatAll()

Method Source Code

// https://egghead.io/lessons/javascript-create-an-array-concatall-method

const exchanges= [/* www  .ja v  a  2s.  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},
  ],
]

console.log('\nVIDEO 05')
exchanges.forEach(exchange => exchange.forEach(stock => console.log(stock)))

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

exchanges
  .concatAll()
  .forEach(stock => console.log(stock))

Related

1. concatAll()

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

2. 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 },
     ],
   ...
   

3. 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}
       ]
   ...
   

4. concatAll()

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

5. concatAll()

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

6. concatAll()

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

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() {
       this.forEach( function(val1) {
           val1.forEach( function (val2) {
                   return allWords.push(val2);
           });
       });
   };
   

9. concatAll()

   var 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 }
       ]
   ...