From: Stephen Duncan <stephen.duncan@...>
Date: 2007-04-23T11:42:50+09:00
Subject: Re: Question regarding design of the String Class

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Try:
    b = a[1..-1]

-Stephen

On 4/22/07, Michael W. Ryder <_mwryder@worldnet.att.net> wrote:
>
> Roland Crosby wrote:
> > On Apr 22, 2007, at 10:00 PM, Michael W. Ryder wrote:
> >
> >> Was there a reason the string class was implemented with str[i]
> >> returning the code of position i in str?  The reason I ask this is
> >> that in other languages str[i] returns the string starting at position
> >> i. For example C uses t = strcpy(str[i]) and Business Basic uses
> >> S$=T$(I) to copy a string from position i.
> >> I can see no way to do this in Ruby other than using something like: t
> >> = str[i,9999].  It seemed strange that copying ranges of strings uses
> >> the same format as C (t =strncpy(str[i],n)) but not when copying the
> >> remainder.
> >
> > Try str[i,-1], or one of the myriad other ways to access ranges of a
> > string as defined in String#[]
> >
> If I enter:
>         a = "This is a test."
>         b = a[1, -1]
>         puts b
> irb returns nil.  Obviously this is not what I want.  If instead of -1 I
> use 9999 it returns "his a test." which is what I was looking for.  This
> seems like a kludge and an inconsistency.  Like I pointed out other
> languages just use b = a[1] to get the remainder of the string instead
> of 104.  The string class already has methods like each_byte for
> converting characters in a string to a number, so why does it need
> another shortcut for something that is probably very rarely used.
>
>


-- 
Stephen Duncan Jr
www.stephenduncanjr.com

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