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From: Robert Klemme <shortcutter@googlemail.com>
Newsgroups: comp.lang.ruby
Subject: Re: issue with stripping tabs
Date: Sat, 23 Nov 2013 13:22:43 +0100
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On 23.11.2013 10:07, helmut_blass@web.de wrote:
> without success I try to strip leading and trailing tabs:
> I tried:
> str.gsub(/\s+/, "")
> str.gsub(/\t/, "")
> str.strip.gsub(/\t/, "")
>
> none of them works.
>
> any suggestions?

Where's your problem?  They all work - in a way

irb(main):004:0> strings=["a", "\ta", "a\t", "\ta\tb\t"]
=> ["a", "\ta", "a\t", "\ta\tb\t"]
irb(main):005:0> strings.map {|str| str.gsub(/\s+/, "")}
=> ["a", "a", "a", "ab"]
irb(main):006:0> strings.map {|str| str.gsub(/\t/, "")}
=> ["a", "a", "a", "ab"]
irb(main):007:0> strings.map {|str| str.strip.gsub(/\t/, "")}
=> ["a", "a", "a", "ab"]

You might want to do

irb(main):008:0> strings.map {|str| str.sub(/\A\t+/, "").sub(/\t+\z/, "")}
=> ["a", "a", "a", "a\tb"]

But #strip is much simpler, even though it removes other whitespace as well:

irb(main):009:0> strings.map {|str| str.strip}
=> ["a", "a", "a", "a\tb"]

Cheers

	robert


-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/