How can I get object by key?

Question

var test = [
    {
        id   : 'user01',
        pos0 : 2 
    },
    {
        id   : 'user01',
        pos0 : 3 
    },
    {
        id   : 'user02',
        pos1 : 5 
    },
    {
        id   : 'user02',
        pos1 : 6 
    },
    {
        id   : 'user03',
        pos2 : 8 
    },
    {
        id   : 'user03',
        pos2 : 9 
    }
]

This is example data,

and I want if I passed 'pos2', get test[4] and test[5].

//like this : 

function getObjectByKey(array, key){
    // dosomething
};

..
var testArray = getObjectByKet(test, 'pos2');

I tried to use $.inArray or $.map, but how to use them. How can i do this?

Regards.

sorry, I mistaked. I edited question.. – vvThat Oct 28 '15 at 07:26 — vvThat, Oct 28 '15 at 07:26

balachandar · Accepted Answer · 2015-10-28T08:19:30.053

1

Please try this,

 function getObjectByKey(array, key){
        var users=[];
        $.map(array, function (user, index) {
            if (user[key])
                users.push(user)
        });
        return users;
    };

hope this will help you.

Also change your function calling. You miss spelled the function name Try this while calling the method

var testArray = getObjectByKey(test, 'pos2');

edited Oct 28 '15 at 08:19

answered Oct 28 '15 at 07:38

balachandar

825
4
13

score 0 · Answer 2 · answered Oct 28 '15 at 07:23

I would suggest to use Array.prototype.map() method to iterate an array. Like this:

var test = [
    {
        id   : 'user01',
        pos0 : 2 
    },
    {
        id   : 'user01',
        pos0 : 3 
    },
    {
        id   : 'user02',
        pos1 : 5 
    },
    {
        id   : 'user02',
        pos1 : 6 
    },
    {
        id   : 'user03',
        pos2 : 8 
    },
    {
        id   : 'user03',
        pos2 : 9 
    }
]
var user;
test.map(function(v) { if(v.id == 'user03') user = v;  });

Here is a FIDDLE.

How can I get object by key?

2 Answers2