Nodejs Array Check isMember(b)

Method Source Code

Array.prototype.isMember = function (b) {
  return this.some(function (i) {
    return this == i
  }, b);/*from   w  ww .  j a  v  a  2 s. com*/
}


/*
//tests
console.log([6, 5, 't'].powerSet());
console.log(['a', 'b', 'c'].isMember('d'));
console.log([1, 2, 3].isMember(3));
*/

Related

1. isCharPresent(charSearch)

   Array.prototype.isCharPresent = function(charSearch) {
     var arr = this;
     var result = [];
     var testingStr = '';
     if (charSearch.length > 1) {
       return "You're searching for more than one char";
     for (var i = 0; i < this.length; i++) {
       if (arr[i].indexOf(charSearch) === -1) {
   ...
   

2. isDefined(key)

   Array.prototype.isDefined = function (key) {
       return this.filter(c => {
           if (key) return c[key];
           return !!c;
       });
   

3. isDistinct()

   Array.prototype.isDistinct = function() {
     this.sort();
     for (var i = 1; i < this.length; i++) {
       if (this[i - 1] == this[i])
         return false;
     return true;
   };
   

4. isInt()

   Array.prototype.isInt = function (){
     return this.filter(function(n){ return (typeof(n) === 'number') && (n%1 === 0)})
   };
   Array.prototype.even = function (){
     return this.isInt().filter(function(n){ return n%2 === 0})
   };
   Array.prototype.odd = function (){
     return this.isInt().filter(function(n){ return n%2 !== 0})
   };
   ...
   

5. isLastIndex(index)

   Array.prototype.isLastIndex = function(index) {
     return index == (this.length - 1);
   

6. isNFromLastIndex(index, n)

   Array.prototype.isNFromLastIndex = function(index, n) {
     return (this.length - 1 - n) == index;
   

7. isNothing()

   Array.prototype.isNothing = function() {
     return this.length === 0;
   };
   

8. isNumberArray()

   'use strict';
   Array.prototype.isNumberArray = function() {
       return !this.some(x => typeof x != 'number');
   module.exports = function segmentNumbers(arr) {
       arr = arr.sort();
       if (!arr.isNumberArray()) return [];
       let container = [],
           items = [],
   ...
   

9. isSparse()

   Array.prototype.isSparse = function() {
     return this.length !== Object.keys(this).length;