Nodejs Array Search searchObject(filterParams)

Method Source Code

'use strict';//from w ww.ja va 2 s  . c o  m

/**
 * Ricerca di oggetti tramite parametri
 * 
 * @param filterParams
 * @returns {Array.<T>}
 */
Array.prototype.searchObject = function (filterParams) {
    return this.filter(function (v) {
        return recursiveMatchFunc(v, filterParams);
    });
};

/**
 * Ritorna un elemento casuale dell'array
 * @returns {*}
 */
Array.prototype.randomSelect = function () {
    return this[Math.floor(Math.random() * this.length)];
};

/**
 * Match ricorsivo
 * @param data
 * @param params
 * @returns {boolean}
 */
function recursiveMatchFunc(data, params) {
    var match = true;
    if (typeof params == "object" && typeof data == "object") {
        Object.keys(params).map(function (label) {
            if (data.hasOwnProperty(label)) {
                match = match && recursiveMatchFunc(data[label], params[label]);
            } else {
                match = false;
            }
        });
    } else {
        return data == params;
    }
    return match;
}

Related

1. search(v)

   Array.prototype.search = function(v){
     for (i=0;i<this.length;i++) {
       if (this[i]===v) return i;
   

2. search(value)

   Array.prototype.search = function(value){
     var startIndex  = 0,
     stopIndex = this.length - 1,
     middle = Math.floor((stopIndex + startIndex)/2);
     var count = 0;
     while(this[middle] != value && startIndex < stopIndex){
       if (value < this[middle]){
         stopIndex = middle - 1;
       }else if (value > this[middle]){
   ...
   

3. search(value)

   Array.prototype.search = function(value){
     var startIndex  = 0,
     stopIndex = this.length - 1,
     middle = Math.floor((stopIndex + startIndex)/2);
     var count = 0;
     while(this[middle] != value && startIndex < stopIndex){
       count+=1;
       if (value < this[middle]){
         stopIndex = middle - 1;
   ...
   

4. searchById(id)

   Array.prototype.searchById = function(id){
     for(var i=0; i<this.length; i++){
       if(this[i].id === id){
         return this[i];
   };
   

5. searchIndex(n)

   "use strict";
   Array.prototype.searchIndex = function(n){
     var result = [],
         i,
         l= this.length;
     for( i= 0; i< l; i++){
       if(this[i] == n){
         result.push(i);
     if(result.length == 0){
       result.push(-1);
     return result;
   };
    var arr = [1,2,5,5,5,5,5,6,9];
   console.log(arr.searchIndex(5));
   console.log(arr.searchIndex(0));