Nodejs Array Where where(f)

Method Source Code

// json lambda select

Array.prototype.where = function(f){
   var fn = f;/*  ww w  .  j  a  v  a2 s  . co  m*/
   if(typeof f == 'string'){
      if((fn=lambda(fn)) == null){
         throw "Syntax error in lambda string: "+ f;
      }
   }
};

Related

1. where(_cond)

   Array.prototype.where = function (_cond) {
       var items = []; 
       for (var l = 0; l < this.length; l++) {
           if (_cond(this[l])) {
               items.push(this[l]);
       return items;
   };
   ...
   

2. where(argument)

   Array.prototype.where = function(argument) {
     return this.filter(item => argument(item));  
   };
   

3. where(attribut, value)

   Array.prototype.where = function (attribut, value) {
       var res = [];
       for (var i = 0; i < this.length; i++) {
           if (this[i][attribut] == value)
               res.push(this.slice(i, i + 1));
       return res;
   };
   

4. where(callback)

   Array.prototype.where = function(callback){
     if(!callback) return;
     for(var i = 0; i < this.length; i++){
       if(callback(this[i])){
         return this[i];
   

5. where(exp)

   Array.prototype.where = function(exp){
       var exp = new Function("$", "return " + exp);
       var arr=[];
       for(var i=0; i<=this.length-1; i++){
           if(exp(this[i])){
               arr.push(this[i])
       return arr;
   ...
   

6. where(f)

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

7. where(func)

   Array.prototype.where = function(func) {
     var result = [];
     for (var i = 0; i < this.length; i++)
       if (func(this[i]))
         result.push(this[i]);
     return result;
   };
   

8. where(func)

   Array.prototype.where = function(func){
     var result = [];
     forEach(this, function (element) {
       if(func(element)){
         result.push(element);
     });
     return result;
   

9. where(func)

   Array.prototype.where = function (func) {
       var items = [],
           length = this.length;
       for (var i = 0; i < length; i++) {
           if (func(this[i]))
               items.push(this[i]);
       return items.length === 0 ? null : items;