Nodejs Array Delete by Index delete_at(from, to)

Method Source Code

Array.prototype.delete_at = function(from, to) {
  var rest = this.slice((to || from) + 1 || this.length);
  this.length = from < 0 ? this.length + from : from;
  return this.push.apply(this, rest);
}

Array.prototype.delete_if = function(matcher){
  for(var i = 0; i < this.length; i++){
    if(matcher(this[i])) {
      this.delete_at(i)//from w  w  w  . jav  a  2s  . c om
      i--
    }
  }
}

Array.prototype.delete_unless = function(matcher){
  this.delete_if(function(item){
    return !matcher(item)
  })
}

Related

1. delete()

   Array.prototype.delete = function() { 
       var arr = this;
       var todel = arguments[0];
       if(todel && todel instanceof Array) {
           var arraux = [];
           for(var i=0; i<todel.length;i++) {
               arr.some(function(el, j){
                   if(el == todel[i]){
                       arraux.push(j+'');
   ...
   

2. delete(index)

   'use strict';
   Array.prototype.delete = function (index) {
       delete this[index];
       this.splice(index, 1);
       return this;
   };
   

3. deleteAll()

   Array.prototype.deleteAll = function(){
     var arr = this;
     arr.splice(0,arr.length);
   

4. deleteAt(index)

   Array.prototype.deleteAt = function(index) {
     return this.splice(index, 1);
   };
   

5. deleteItems(ids, filterEmpty = true)

   Array.prototype.deleteItems = function (ids, filterEmpty = true) {
       var result = this.slice();
       if (typeof ids === 'object' && ids.constructor === [].constructor) {
           ids.sort(function (a, b) {
               return b > a;
           }).forEach(function (value) {
               if (filterEmpty) {
                   result.splice(value, 1);
               } else {
   ...