问题
I have some zeros prior to a positive integer. I want to remove the zeros so only the positive integer remains. Like '001' will only be '1'. I thought the easiest way was to use parseInt('001'). But what I discovered is that it don't works for the number 8 and 9. Example parseInt('008') will result in '0' instead of '8'.
Here are the whole html code:
<html> <body>
<script>
var integer = parseInt('002');
document.write(integer);
</script>
</body> </html>
But can I somehow report this problem? Do anyone know an another easy workaround this problem?
回答1:
This is documented behavior: http://www.w3schools.com/jsref/jsref_parseInt.asp
Strings with a leading '0' are parsed as if they were octal.
回答2:
You have to specify the base of the number (radix)
parseInt('01', 10);
回答3:
Number prefixed with zero is parsed as octal.
回答4:
This is not actually a bug. For legacy reasons strings starting with 0 are interpreted in octal, and in octal there is no digit 8. To work around this you should explicitly pass a radix (i.e. parseInt("008", 10)).
来源：https://stackoverflow.com/questions/4481524/javascript-function-parseint-doesnt-parse-numbers-with-leading-0-correctly