Get the largest value from Json object with Javascript

Question

Hi

This should be an easy one. I just cant figure it out.

How do I get the largest value from this piece of JSON with javascript.

{"data":{"one":21,"two":35,"three":24,"four":2,"five":18},"meta":{"title":"Happy with the service"}}

The key and value I need is:

"two":35 

as it is the highest

thanks

Answer 1

var foo = {"data":{"one":21,"two":35,"three":24,"four":2,"five":18},"meta":{"title":"Happy with the service"}};

var largest = {
    key: null,
    val: null
};

for(var i in foo.data){
    if( foo.data[i]>largest.val ){
        largest.key = i;
        largest.val = foo.data[i];
    }
}
alert(largest.key + "\n" + largest.val);

Answer 2

var json = '{"data":{"one":21,"two":35,"three":24,"four":2,"five":18},"meta":{"title":"Happy with the service"}}';
var obj = eval("(" + json + ")");
var maxKey;
var maxValue = 0;
for (key in obj.data)
{
    if (obj.data.hasOwnProperty(key))
    {
        var value = parseInt(obj.data[key], 10);
        if (value > maxValue)
        {
            maxKey = key;
            maxValue = value;
        }
    }
}