Nodejs Array Filter filter(test)

Method Source Code

Array.prototype.filter = function (test) {
    var i, item, newArray = [];
    for (i = 0; i < this.length; i++) {
   item = this[i];//from w w  w .j  a v  a 2  s. co m
   if (test(item)) {
       newArray.push(item);
   }
    }
    return newArray;
};

Related

1. filter(predicateFunction)

   Array.prototype.filter = function(predicateFunction) {
     var results = [];
     this.forEach(function(itemInArray) {
       if (predicateFunction(itemInArray)) {
       results.push(itemInArray);
     });
     return results;
   };
   ...
   

2. filter(predicateFunction)

   Array.prototype.filter = function(predicateFunction) {
     var results = [];
     this.forEach(itemInArray => {
       if(predicateFunction(itemInArray)) {
          results.push(itemInArray);
     });
     return results;
   };
   ...
   

3. filter(predicateFunction)

   Array.prototype.filter = function(predicateFunction) {
     var results = [];
     this.forEach(function(itemInArray) {
       if (predicateFunction(itemInArray)) {
       results.push(itemInArray);
     });
     return results;
   };
   ...
   

4. filter(predicateFunction)

   Array.prototype.filter = function(predicateFunction) {
     var results = [];
     this.forEach(function(item) {
       if (predicateFunction(item)) {
         results.push(item);
     });
     return results;
   

5. filter(search, func)

   Array.prototype.filter = function(search, func) {
     var results = [];
     for(var i = 0; i < this.length; i++) {
       if(func(search, this[i]))
          results.push(this[i]);
     return results;
   

6. filter(testFunction)

   Array.prototype.filter = function(testFunction){
     var result = [];
     this.forEach(function(item){
       if(testFunction(item)){
         result.push(item);
     })
     return result;
   

7. cs142filter(element, func)

   'use strict'
   Array.prototype.cs142filter = function(element, func) {
     var result = [];
     var array = Object(this);
     var length = array.length;
     for (var i = 0; i < length; i++) {
       var val = array[i];
       if (func.call(undefined, element, val)) {
         result.push(val);
   ...
   

8. customFilter(fn)

   Array.prototype.customFilter = function(fn) {
     let results = [];
       for (let i = 0; i < this.length; i++) {
           let itemExists = fn(this[i]);
           if (itemExists) {
               results.push(this[i]);
     return results;
   ...
   

9. filterByField(field, key)

   Array.prototype.filterByField = function(field, key) {
     var newArray = [];
     for (var i = 0; i < this.length; i++) {
       if (this[i][field] == key) {
         newArray.push(this[i]);
     return newArray;
   };
   ...