Nodejs Array Subset isSubsetOf(arr)

Method Source Code

Array.prototype.isSubsetOf = function(arr) {
  return isSubsetObjs(this, objectify(arr));
};
var isSubsetObjs = function(arr, obj2) {
  for (var i = 0; i < arr.length; i++) {
    if (!obj2.hasOwnProperty(arr[i])) { 
     return false; 
    }// w w w  . java  2 s.  c  o  m
  } return true;
};
var objectify = function(arr) {
  return arr.reduce(function (out, item) {
    out[item] = true;
    return out;
  }, {})
};

Related

1. isSubsetOf()

   Array.prototype.isSubsetOf = function() {
       var args=arguments[0];
       var len=this.length;
       var i;
       var counter=0;
       console.log(args);
       for(i=0; i<len; i++){
           if(args.indexOf(this[i])>=0){
               counter++;
   ...
   

2. isSubsetOf(arr)

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

3. isSubsetOf(arr)

   Array.prototype.isSubsetOf = function (arr) {
     var objectify = function(arr) {
       var obj = {};
       for (var i = 0; i < arr.length; i++) {
         obj[arr[i]] = true;
       return obj;
     };
     var obj = objectify(arr);
   ...
   

4. isSubsetOf(arr)

   Array.prototype.isSubsetOf = function (arr) {
     let result = 0;
     for (let i = 0; i < this.length; i += 1) {
       for (let p = 0; p < arr.length; p += 1) {
         if (this[i] === arr[p]) {
           result += 1;
           break;
       if (i + 1 !== result) {
         return false;
     return true;
   };
   const b = ['merge','reset','reset']
   console.log(b.isSubsetOf(['reset','merge','add','commit']));
   const a = ['commit','push','blame'];
   console.log(a.isSubsetOf(['commit','rebase','push','blame']));
   

5. isSubsetOf(arr)

   Array.prototype.isSubsetOf = function (arr) {
     var subArr = this;
     var words = {};
     for (var i = 0; i < arr.length; i++) {
       if (!words[arr[i]]) {
         words[arr[i]] = true;
     for (var i = 0; i < subArr.length; i++) {
   ...