JavaScript parseInt Usage
I have had a bit of a hair pulling experience over the last few hours, until finally I got some sense and looked at the Definition and Usage of parseInt. Here’s the example:
<script type="text/javascript">
var data = new Array('007', '008', '009', '010');
for(var x in data)
{
console.log(data[x] + ' -> ' + parseInt(data[x]));
}
</script>
And the result:
007 -> 7 008 -> 0 009 -> 0 010 -> 8
What I wanted was the result 7, 8, 9, and 10. The result seen above comes from the fact that, because I have a leading 0 in my strings, parseInt is reverting to a base 8 (octal) radix. The solution of course is to specify a base 10 (decimal) radix.
<script type="text/javascript">
var data = new Array('007', '008', '009', '010');
for(var x in data)
{
console.log(data[x] + ' -> ' + parseInt(data[x], 10));
}
</script>
And the result:
007 -> 7 008 -> 8 009 -> 9 010 -> 10
Tags: JavaScript