Nodejs Array Splice splice(start, length)

Method Source Code

Array.prototype.splice = function(start, length){
    var len = this.length;
    var i = 0;//from w  ww. j  ava  2 s  .c  om
    var res = [];
    var newArr = [];

    for(; i<len; i++){
        if(i>=start && i<= start + length){
            res.push(this[i]);
            break;
        }

        newArr.push(this[i]);
    }

    return newArr;
}

console.log(([1,2,3]).splice(1,1));

Related

1. splice(a, b)

   Array.prototype.splice = function(a, b)
     var tmp = [];
     for (var i = a + b; i < this.length; i++)
       tmp[tmp.length] = this[i];
     var rem = [];
     for (i = a; i < a + b; i++)
   ...
   

2. splice(from, count)

   'use strict';
   Array.prototype.splice = function (from, count) {
     function getArrayKeys(a) {
       var keys = [];
       for (var key in a) {
         keys.push(key);
       return keys;
     var keys = getArrayKeys(this);
     var poppedValues = [];
     for(var keyPosition in keys) {
       if (keyPosition < from) {
         continue;
       poppedValues.push(this.pop());
     var removedValues = [];
     for (var i = count ; i > 0 ; i-- ) {
       removedValues.unshift(poppedValues.shift());
     var args = Array.prototype.slice.call(arguments);
     args.shift();
     args.shift();
     for (var n in args) {
       this.push(args[n]);
     for (var x in poppedValues) {
       this.unshift(poppedValues[x]);
     return removedValues;
   };
   module.exports = Array.prototype.splice;
   

3. splice(start, deleteCount)

   Array.prototype.splice = function (start, deleteCount) {
      var max = Math.max,
         min = Math.min,
         delta,
         element,
         insertCount = max(arguments.length - 2, 0),
         k = 0,
         len = this.length,
         new_len,
   ...
   

4. splice(start, num)

   Array.prototype.splice = function(start, num) {
     var additions = $A(arguments).slice(2);
     var delta = additions.length - num;
     var newlen = this.length + delta;
     if (delta >= 0) {
       this.length += delta;
     for (var i = start + num + delta; i < newlen + delta + 1; i++) {
       this[i] = this[i - delta];
   ...
   

5. splice2(start, count, arr)

   Array.prototype.splice2 = function(start, count, arr) {
       this.splice(start, count);
       for (var i = 0; i < arr.length; ++i)
           this.splice(start + i, 0, arr[i]);