UTF-8 string in Ruby

Question

I have the following module:

# encoding: utf-8
module RandomNameModule

    def self.doesNothing(word)
        str = ""
        word.codepoints{|val|
            str << val.chr
        }
        return str
    end
end

and the following test:

# encoding: utf-8
require 'test/unit'
require '../src/RandomNameModule.rb'

class RandomNameTests < Test::Unit::TestCase
    def testDoesNothing
        sorted = WordSort.word_sort("£$&")
        assert_equal("£$&", sorted)
    end
end

When I run the test I get an assertion failure:

<"£$&"> expected but was
<"\xA3$&">.

This is because "£".codepoints{|x| x.chr} returns the value \xA3

how can I make this return £

rubiii · Accepted Answer · 2011-04-16 14:13:35Z

4

The Integer#chr method used in your example seems to default to ASCII if you don't explicitely tell it what encoding to use:

def self.doesNothing(word)
  str = ""
  word.codepoints { |val| str << val.chr("utf-8") }
  str
end

Also, using String#each_char instead of String#codepoints works fine as well:

def self.doesNothing(word)
  str = ""
  word.each_char { |val| str << val }
  str
end

edited Apr 16, 2011 at 14:13

answered Apr 16, 2011 at 14:01

rubiii

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1 Comment

Aly Over a year ago

Thanks! I cant use each_char as I need the utf-8 integer value too.

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