CODEWITHSUNDEEP
javascriptobject
Reuven Karasik
Reuven Karasik

Reputation: 484

JS check mutual items of 2 objects

I have 2 JS Objects:

The first one:

One = {
   "Sunday": {
      1:false,
      2:false,
      3:true,
      4:false, .... until 24. Each item could be either true or false.
   },
   "Monday": {1:true, 2:false, ....},
   //And so on, 7 days of the week
}

The second is just like the first one only its values (true/false) are different.

I want to run a function that can tell me, I don't care how, which items have true in both Objects. For example, if One.Sunday[2] = true and Two.Sunday[2] = true, I want to know that.

I hope I was clear enough.

If possible it would be nice if that same function could accept 3 or more objects also and return the mutual items of all objects.

Thanks, Reuven

Upvotes: 0

Views: 230

Answers (3)

StackSlave
StackSlave

Reputation: 10627

Try:

function mutual(){
  var a = arguments, o = {};
  for(var i in a){
    var ai = a[i];
    out: for(var n in ai){
      o[n] = {}
      for(var q in ai[n]){
        if(!ai[n][q]){
          if(o[n][q]){
            delete o[n][q];
          }
          break out;
        }
        o[n][q] = true;
      }
    }
  }
  for(var i in o){
    var c = 0;
    for(var n in o[i]){
      c++;  
    }
    if(c === 0){
      delete o[i];
    }
  }     
  return o;
}
// assumes One, Two, Three, Four, Five are Objects
// use firebug for this console.log() or create loops
console.log(mutual(One, Two, Three, Four, Five));

Upvotes: 0

Harpreet Singh
Harpreet Singh

Reputation: 2671

var sundayOne = {1:true,2:false,3:false,4:true}; 
var mondayOne = {1:true,2:true,3:false,4:false};
var tuesdayOne = {1:false,2:false,3:true,4:true};
var one = {"sunday":sundayOne,"monday":mondayOne,"tuesday":tuesdayOne}; // two objects having 


var sundayTwo = {1:true,2:true,3:true,4:true}; 
var mondayTwo = {1:false,2:false,3:false,4:false};
var tuesdayTwo = {1:true,2:true,3:true,4:true};
var two = {"sunday":sundayTwo,"monday":mondayTwo,"tuesday":tuesdayTwo};

var matchedArr = []
for(each in one) {
    var obj = {} //create new object
    obj[each] = {} //add new object to store matched each - Sunday, Monday
    for(subEach in one[each]) {
        //value is false so we have to check with undefined
        if(two[each][subEach] != undefined) {
            if(one[each][subEach] == two[each][subEach]) {
                console.log('Match found at ', each, subEach, one[each][subEach])
                obj[each][subEach] = one[each][subEach]
            }
        }
    }
    matchedArr.push(obj)
}
console.log(matchedArr)

//output
[Object, Object, Object]
0: Object
    sunday: Object
        1: true
        4: true
1: Object
    monday: Object
        3: false
        4: false
2: Object
    tuesday: Object
    3: true
        4: true
        length: 3

Upvotes: 1

Mritunjay
Mritunjay

Reputation: 25882

I got something working here for array of objects it will return a array of mutual.

Two Objects

var sunday = {1:true,2:false,3:false,4:true}; 
var monday = {1:true,2:true,3:false,4:false};
var tuesday = {1:false,2:false,3:true,4:true};
var one = {"sunday":sunday,"monday":monday,"tuesday":tuesday}; // two objects having 
var two = {"sunday":sunday,"monday":monday,"tuesday":tuesday};

Filtering Mutual :-

function getMutuals (objects) { //get an array of objects
    var mutuals = [];
    objects.forEach(function(obj,index){ 
       mutuals[index] = {};        
       for(var key in obj){
           mutuals[index][key] = [];  //it will create key like sunday,monday in each obj
           var day = obj[key];  // get that key
           for(var i=1;i<25;i++){  
               if(day[i])   //if day[i] is present
                   mutuals[index][key].push(i); //push that i into array of day
           }
       }
   });
   return mutuals;
}

you can call this function with arry of objects like following

var mutuals = getMutuals([one,two]);
console.log(mutuals)

Upvotes: 0

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