Nodejs Array Sort sortByID()

Method Source Code

var library = [ /*  w  w w. j a v a 2  s  . co m*/
   {
       title:  'The Road Ahead',
       author: 'Bill Gates',
       libraryID: 1254
   },
   {
       title: 'Walter Isaacson',
       author: 'Steve Jobs',
       libraryID: 4264
   },
   {
       title: 'Mockingjay: The Final Book of The Hunger Games',
       author: 'Suzanne Collins',
       libraryID: 3245
   }];

Array.prototype.sortByID = function() {
   return this.sort(function (a,b) {
      return b.libraryID- a.libraryID;
   })
};
console.log(library.sortByID());

Related

1. sortBy(keySelector)

   Array.prototype.sortBy = function (keySelector) {
       return this.slice().sort(function(a,b) {
           var aKey = keySelector(a),
               bKey = keySelector(b);
           if (aKey > bKey) {
               return 1;
           else if (bKey > aKey) {
               return -1;
   ...
   

2. sortBy(p)

   Array.prototype.sortBy = function(p) {
     return this.slice(0).sort(function(a,b) {
       return (a[p] > b[p]) ? 1 : (a[p] < b[p]) ? -1 : 0;
     });
   };
   

3. sortBy(p, type)

   Array.prototype.sortBy = function(p, type) {
     if(type == undefined) type = "asc";
     if(type == "desc"){
       return this.slice(0).sort(function(a,b) {
         return (a[p] < b[p]) ? 1 : (a[p] > b[p]) ? -1 : 0;
       });        
     } else {
       return this.slice(0).sort(function(a,b) {
         return (a[p] > b[p]) ? 1 : (a[p] < b[p]) ? -1 : 0;
   ...
   

4. sortByDesc(f)

   Array.prototype.sortByDesc = function (f) {
       return this.sort(function (a, b) {
           if (a[f] < b[f])
               return 1;
           if (a[f] > b[f])
               return -1;
           return 0;
       });
   };
   ...
   

5. sortByFrequency()

   Array.prototype.sortByFrequency = function () {
     var freq = {};
     this.map(function(e, i, a){
       if(e in freq){
         freq[e]++;
       } else {
         freq[e] = 1;
     });
   ...
   

6. sortByID(argument)

   'use strict';
   Array.prototype.sortByID = function(argument){
     this.sort(function(x,y){
       return x.libraryID > y.libraryID;
     });
   };
   var library = [ 
          title:  'The Road Ahead',
   ...
   

7. sortByKeysortByKey(key, dsc)

   Array.prototype.sortByKey = function sortByKey(key, dsc) {
     return this.sort(function(a, b) {
         var x = a[key]; 
         var y = b[key];
         if (dsc ==='dsc') {
           return (x === undefined && y === undefined ? 0 : (x < y) || x === undefined ? 1 : ((x > y) || y === undefined ? -1 : 0));
         return (x === undefined && y === undefined ? 0 : (x < y) || x === undefined ? -1 : ((x > y) || y === undefined ? 1 : 0)); 
     });
   ...
   

8. sortByNumber()

   Array.prototype.sortByNumber = function() {
    return this.sort(function(a, b) { return a - b; }); 
   

9. sortDescending()

   function getLargestPalindrome() {
     products = fillMultiples().sortDescending();
     for (i = 0; i < products.length; i++) {
       if (products[i].toString().isPalindrome()) {
         return products[i];
   function fillMultiples() {
   ...