From: Robert Klemme <shortcutter@...>
Date: 2008-08-20T01:11:38+09:00
Subject: Re: Cut a string if length > n

On 19.08.2008 17:45, ara.t.howard wrote:
> On Aug 19, 2008, at 9:25 AM, Pål Bergström wrote:
> 
>> What's the best way to cut a string if the length is above n  
>> characters?
>> Is it slice, or is there any other convenient method? Trying to
>> understand the string class from the docs but not sure which one to  
>> use.
> 
> 
> this_always_works = string[ 0 .. n ]
> 
> regardless of whether the string is <, =, or > than n

I believe slice! also always works:

irb(main):011:0> s="abcdefghijklmnop"
=> "abcdefghijklmnop"
irb(main):012:0> s.length
=> 16
irb(main):013:0> s.slice! 50..-1
=> nil
irb(main):014:0> s
=> "abcdefghijklmnop"
irb(main):015:0> s.slice! 5..-1
=> "fghijklmnop"
irb(main):016:0> s
=> "abcde"

It looks uglier but it modifies the string in place which might come in 
handy at times.

Kind regards

	robert