Javascript Sorts Arrays Badly!

By Keith Connolly on December 10, 2012

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There comes a time in a coders life that s/he must sort an array numericly.  When this time comes s/he comes to realize that, yes, Javascript does crappy array sorting!  

Take for example this code:

var arr = [4,3,2,1,0,10];
// Here's what it looks like! [0,1,10,2,3,4]

Not great, right?

All you need to do is pass this anonymous function in your sort.

arr.sort(function(a,b){return a-b});
//or if you want the order reversed...
arr.sort(function(a,b){return b-a});
Basically you need to pass a function that returns -1, 0, or 1 for the comparison.  This method does just that.  

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Keith Connolly
Queen Creek, Arizona 85142
P: (480) 231-9285