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From: FAQ server on 28 May 2010 19:00
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FAQ Topic - Why does K = parseInt('09') set K to 0?
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Method ` parseInt ` generally needs a
second parameter, ` radix `, for the base (value between 2 and 36).

If ` radix ` is omitted, the base is determined by the contents of
the string. Any string beginning with ` '0x' ` or ` '0X' ` represents a
hexadecimal number. A string beginning with a leading ` 0 ` may be
parsed as octal (octal digits are ` 0-7 `). The string ` '09' `
is converted to ` 0 `.

To force use of a particular base, use the ` radix `
parameter: ` parseInt("09", base) `.

http://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Functions/parseInt

http://msdn.microsoft.com/en-us/library/x53yedee%28VS.85%29.aspx

http://docs.sun.com/source/816-6408-10/toplev.htm#1064173

http://jibbering.com/faq/notes/type-conversion/#tcPrIntRx


The complete comp.lang.javascript FAQ is at
http://jibbering.com/faq/

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From: Dr J R Stockton on 30 May 2010 12:27
In comp.lang.javascript message <4c004afc$0$285$14726298(a)news.sunsite.dk
>, Fri, 28 May 2010 23:00:03, FAQ server <javascript(a)dotinternet.be>
posted:

>Method ` parseInt ` generally needs a
>second parameter, ` radix `, for the base (value between 2 and 36).
>
>If ` radix ` is omitted, the base is determined by the contents of
>the string. Any string beginning with ` '0x' ` or ` '0X' ` represents a
>hexadecimal number. A string beginning with a leading ` 0 ` may be
>parsed as octal (octal digits are ` 0-7 `). The string ` '09' `
>is converted to ` 0 `.

Still inaccurate.

It should say that, with no radix (or radix == undefined?), the
characters which determine the base can be preceded by whitespace and/or
sign.

It should also say that interpreting "09" as 9 is <whatever ECMA 5
says>, but that only Opera (and ...?) complies.

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Web <URL:http://www.merlyn.demon.co.uk/> - FAQish topics, acronyms, & links.
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