Nodejs Array Push push(value)

Method Source Code

function Array() {
  this.length = 0//from   w ww  .ja  v a  2  s.co  m
}

Array.prototype.push = function(value) {
  this[this.length] = value
  this.length += 1
}

Array.prototype.pop = function() {
  if (this.length > 0) {
    this.length -= 1
    var popValue = this[this.length]
    delete this[this.length]
  }
  return popValue
}

var arr = new Array()
arr.push(1)
console.log(arr.length) // -> 1
arr.push(10)
console.log(arr.length) // -> 2
console.log(arr[0]) // -> 1
console.log(arr[1]) // -> 10
console.log(arr.pop()) // -> 10
console.log(arr.length) // -> 1
console.log(arr.pop()) // -> 1
console.log(arr.length) // -> 0

Related

1. push()

   var a = ['a', 'b', 'c'];
   var b = ['x', 'y', 'z'];
   var c = a.push(b, true);
   console.log("a : " + a); 
   console.log("c : " + c); 
   Array.prototype.push = function () {
       this.splice.apply(
           this,
           [this.length, 0].concat(Array.prototype.slice.apply(arguments))
   ...
   

2. push()

   Array.prototype.push = function () {
     for (var i=0; i<arguments.length; i++)
       this[this.length] = arguments[i];
     return this.length;
   

3. push()

   Array.prototype.push = function()
     for (var i = 0; i < arguments.length; i++)
       this[this.length] = arguments[i];
     return arguments[i - 1];
   };
   

4. push(data)

   Array.prototype.push = function(data) {
     this[this.length] = data;
     return this.length;
   };
   

5. push(elem)

   Array.prototype.push = function(elem) {
     this[this.length] = elem;
     return ++this.length;
   };
   

6. push16(aWord)

   Array.prototype.push16 = function (aWord) {
      this.push((aWord >> 8) & 0xFF,
                (aWord     ) & 0xFF);
   };
   

7. push16(num)

   Array.prototype.push16 = function (num) {
       this.push((num >> 8) & 0xFF,
                 (num     ) & 0xFF  );
   };
   

8. push16(val)

   Array.prototype.push16 = function(val) {
     this.push(0x00FF & val);
     this.push(val >> 8);
     return this;
   };
   

9. push16le(aWord)

   Array.prototype.push16le = function(aWord) {
      this.push((aWord     ) & 0xff,
                (aWord >> 8) & 0xff);
   };