Nodejs Array Subset isSubsetOf(inputArray)

Method Source Code

//Make an array method that can return whether or not a context array is a subset 
//of an input array. To simplify the problem, you can assume that both arrays will 
//contain only strings.

Array.prototype.isSubsetOf = function(inputArray) {
  //var isSubset = true;
  for (var i = 0; i < this.length; i++) {
    var contains = false;
    for (var j = 0; j < inputArray.length; j++) {
      if (inputArray[j] === this[i]) {
        contains = true;/*from  ww w .j  av  a  2  s .c o m*/
      }
    }
    if (!contains) {
      return false;
    }
  }
  return true;
};

Related

1. isSubsetOf(comparisonArray)

   Array.prototype.isSubsetOf = function(comparisonArray) {
     for (var i = 0; i < this.length; i++) {
       if (comparisonArray.indexOf(this[i]) === -1) {
         return false;
     return true;
   };
   

2. isSubsetOf(input)

   Array.prototype.isSubsetOf = function(input) {
     var isSub = true;
     this.forEach(function (el) {
       if (!input.includes(el)) {
         isSub = false;
     });
     return isSub;
   };
   ...
   

3. isSubsetOf(input)

   Array.prototype.isSubsetOf = function(input){
     let result = true;
     this.forEach(item => input.indexOf(item) !== -1 ? result = result && true : result = false);
     return result;
   

4. isSubsetOf(input)

   Array.prototype.isSubsetOf = function(input) {
     var freq = {};
     for (var i = 0; i < this.length; i++) {
       freq[this[i]] = 1;
     for (var j = 0; j < input.length; j++) {
       if (freq[input[j]]) {
         delete freq[input[j]];
     return Object.keys(freq).length === 0;
   };
   

5. isSubsetOf(inputArray)

   Array.prototype.isSubsetOf = function(inputArray) {
     var exists = true;
     for (var i = 0; i < this.length; i++) {
       if (inputArray.indexOf(this[i]) === -1) {
         exists = false;
     return exists;
   };
   ...
   

6. isSubsetOf(matchArr)

   Array.prototype.isSubsetOf = function (matchArr) {
     var arr = this;
     for (var i = 0; i < arr.length; i++) {
       if (matchArr.indexOf(arr[i]) === -1 && typeof arr[i] !== 'object') {
         return false;
     return true;
   };
   ...
   

7. isSubsetOf(subset)

   'use strict';
   Array.prototype.isSubsetOf = function(subset){
     var arr = this;
   };
   

8. isSubsetOfarray()

   Array.prototype.isSubsetOf = array => {
     let hash = {};
     let result = true;
     array.forEach(item => {
       hash.item ? hash.item++ : hash.item = 0;
     });
     this.forEach(item => {
       hash.item ? hash.item++ : result = false;
     });
   ...