Get the highest and lowest values of a certain attribute in jQuery or Javascript

Question

I have the following divs:

test
test


        
                      

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Answer 1

Create a global variable and compare it to each element using Math.max inside a loop.

var maxval = Number.MIN_VALUE,
    minval = Number.MAX_VALUE;

$('div').each(function () {
    var num = parseInt(this.id, 10) || 0; // always use a radix
    maxval = Math.max(num, maxval);
    minval = Math.min(num, minval);
});

console.log('max=' + maxval);
console.log('min=' + minval);

http://jsfiddle.net/mblase75/gCADe/