From: kjana@...4lab.to (YANAGAWA Kazuhisa)
Date: 2002-08-04T12:20:12+09:00
Subject: Re: String -> Integer anomoly?

In message <021901c23b52$c7d86580$0300a8c0@austin.rr.com>
hal9000@hypermetrics.com writes:

> > Why does "09".to_i return 9
> > and Integer("09") raise an error?
(snip)
>   "09".to_i     # 9 (assumes decimal with leading 0)
>   "0xabc".to_i  # 0

And then Integer() considers "09" as a representation of an octal
number, but it contains "9", exceeding radix of octal.

    Integer("12")   #=> 12 in decimal
    Integer("012")  #=> 10 in decimal
    Integer("0x12") #=> 18 in decimal


Integer() raises exception on ill-formed string passed for its
argument, where ill-formed means whole expression doesn't satisfy
conditions for integer literals.

    > ruby -e 'p 012' #=> 10
    > ruby -e 'p 09'  #=> -e:1: Illegal octal digit


# Hmm, Integer() should show more descriptive message like on syntax
# checking?


-- 
kjana@dm4lab.to                                 August 4, 2002
What is done can't be undone.