From: Peter Vandenabeele <peter@...>
Date: 2011-01-13T07:50:49+09:00
Subject: Re: String.strip with UTF-8

Erik E. wrote in post #974416:
> Hi
>
> I can't strip the leading whitespace (or what at least looks like
> whitespace) from a Ruby 1.9.2 string
>
>
> ruby-1.9.2-p0 :002 > d.entity
>  => " United Arab Emirates"
> ruby-1.9.2-p0 :003 > d.entity.strip
>  => " United Arab Emirates"
> ruby-1.9.2-p0 :004 > d.entity.class
>  => String
> ruby-1.9.2-p0 :005 > d.entity.encoding
>  => #<Encoding:UTF-8>
> ruby-1.9.2-p0 :006 >
>
> It's inside the Rails 3.0.3 console..
>
> Erik

Hi, I made a fresh install with rvm 1.9.2-p0 and rails 3.0.3
and I cannot reproduce your problem. Maybe you could try to
replay what I did and see if you can still reproduce it ?

Also, to examine that first character in detail, what is the
result when you try this:

009:0> d.entity.bytes.to_a[0..5]
=> [32, 85, 110, 105, 116, 101]

I see a "regular" space (character 32 in decimal notation)
as first character.

HTH,

Peter


peterv@ASUS:~/ra/apps/trials$ rvm install 1.9.2-p0
/home/peterv/.rvm/rubies/ruby-1.9.2-p0, this may take a while depending
on your cpu(s)...

ruby-1.9.2-p0 - #fetching
...
Install of ruby-1.9.2-p0 - #complete

peterv@ASUS:~/ra/apps/trials$ rvm use 1.9.2-p0
Using /home/peterv/.rvm/gems/ruby-1.9.2-p0

peterv@ASUS:~/ra/apps/trials$ rvm gemset create rails3
'rails3' gemset created (/home/peterv/.rvm/gems/ruby-1.9.2-p0@rails3).

peterv@ASUS:~/ra/apps/trials$ rvm gemset use rails3
Now using gemset 'rails3'

peterv@ASUS:~/ra/apps/trials$ gem install rails --no-rdoc --no-ri
Successfully installed activesupport-3.0.3
Successfully installed builder-2.1.2
Successfully installed i18n-0.5.0
Successfully installed activemodel-3.0.3
Successfully installed rack-1.2.1
Successfully installed rack-test-0.5.7
Successfully installed rack-mount-0.6.13
Successfully installed tzinfo-0.3.23
Successfully installed abstract-1.0.0
Successfully installed erubis-2.6.6
Successfully installed actionpack-3.0.3
Successfully installed arel-2.0.6
Successfully installed activerecord-3.0.3
Successfully installed activeresource-3.0.3
Successfully installed mime-types-1.16
Successfully installed polyglot-0.3.1
Successfully installed treetop-1.4.9
Successfully installed mail-2.2.14
Successfully installed actionmailer-3.0.3
Successfully installed thor-0.14.6
Successfully installed railties-3.0.3
Successfully installed bundler-1.0.7
Successfully installed rails-3.0.3
23 gems installed

peterv@ASUS:~/ra/apps/trials$ rails new issue_with_strip
      create
...
      create  vendor/plugins/.gitkeep
peterv@ASUS:~/ra/apps/trials$ cd issue_with_strip/
peterv@ASUS:~/ra/apps/trials/issue_with_strip$ bundle install
Fetching source index for http://rubygems.org/
Using rake (0.8.7)
...
Using rails (3.0.3)
Installing sqlite3-ruby (1.3.2) with native extensions
Your bundle is complete! Use `bundle show [gemname]` to see where a
bundled gem is installed.

peterv@ASUS:~/ra/apps/trials/issue_with_strip$ rails g model D
entity:string
      invoke  active_record
      create    db/migrate/20110112222955_create_ds.rb
      create    app/models/d.rb
      invoke    test_unit
      create      test/unit/d_test.rb
      create      test/fixtures/ds.yml

peterv@ASUS:~/ra/apps/trials/issue_with_strip$ rake db:migrate
(in /home/peterv/data/back/rails-apps/apps/trials/issue_with_strip)
==  CreateDs: migrating
=======================================================
-- create_table(:ds)
   -> 0.0010s
==  CreateDs: migrated (0.0011s)
==============================================

US:~/ra/apps/trials/issue_with_strip$ rails c
Loading development environment (Rails 3.0.3)
001:0> IRB.prompt_mode=:RVM # this is a local patch
 => :RVM
ruby-1.9.2-p0 :002 > d = D.create :entity => " United Arab Emirates"
 => #<D id: 1, entity: " United Arab Emirates", created_at: "2011-01-12
22:31:21", updated_at: "2011-01-12 22:31:21">
ruby-1.9.2-p0 :003 > d.entity
 => " United Arab Emirates"
ruby-1.9.2-p0 :004 > d.entity.strip
 => "United Arab Emirates"
ruby-1.9.2-p0 :005 > d.entity.class
 => String
ruby-1.9.2-p0 :006 > d.entity.encoding
 => #<Encoding:UTF-8>
ruby-1.9.2-p0 :007 > exit

peterv@ASUS:~/ra/apps/trials/issue_with_strip$ rails c
Loading development environment (Rails 3.0.3)
001:0> d = D.find :last
=> #<D id: 1, entity: " United Arab Emirates", created_at: "2011-01-12
22:31:21", updated_at: "2011-01-12 22:31:21">
002:0> d.entity
=> " United Arab Emirates"
003:0> d.entity.strip
=> "United Arab Emirates"

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