Assigning Unordered keys to a Js array

Question

I am getting a random key value pair,Can i assign it to an array?

Its problematic here when I assign it like arr[50] = 'abc' it automatically creates the keys upto 50 like arr[0],arr[1],arr[2] and so on.

and i wanted an array like this arr[50=>'abc','40'=>'pqr','53'=>'lmn']

I have it here

if(typeof(feedArr.latestRating) == 'object'){ 
                  jQuery.each(feedArr.latestRating,function(key,val){alert('key::'+key);
                    if(key in newRatingArr){ 
                    //delete the key if already exists
                      newRatingArr.splice(key,1);

                    }else{
                      //insert the key,value
                        newRatingArr[key] = val; //here is the problem occurs when key is 50 it automatically creates the indexes in the array upto 50 which i dont want
                       // alert('Key between::'+key);
                       // alert('Value between::'+newRatingArr[key]);
                      //newRatingArr.splice(key,0,val);
                    }
                    //alert(key); 
                  emptyRate = 0;

                  });
                }else{
                  emptyRate = 1;
                }

What can i do here?Please let me know.

AKX · Accepted Answer · 2012-05-09 19:14:26Z

5

Use an object {} instead of an array [].

Objects can act as unordered key-value containers, which is what you seem to be needing here.

// somewhere...
var newRatingArr = {};

// your code.
var emptyRate = true;
if (typeof (feedArr.latestRating) == 'object') {
    jQuery.each(feedArr.latestRating, function (key, val) {
        newRatingArr[key] = val;
        emptyRate = false;
    });
}

answered May 9, 2012 at 19:14

AKX

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7 Comments

techie_28 Over a year ago

Will the other functions like SPLICE and all work on an object too? AKX?

techie_28 Over a year ago

my other array functions like concat and shuffle are use less if i use objects here AKX

AKX Over a year ago

But if you don't have array-like, contiguous data, then you shouldn't force it into an array...

techie_28 Over a year ago

Well i need to use my data which is most convenient to access in array form.Can I do that in objects?like deleting something from an object at certain index, inserting into it and iterating over it to show a result?

AKX Over a year ago

You can delete by a certain key (delete x["foo"]);, modify by keys (x["foo"] = 1; (or x.foo = 1;)) and iterate (in no specified order) (for(var k in x) console.log(k, x[k]);), yes.

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