From: George George <george.githinji@...>
Date: 2008-12-10T17:54:55+09:00
Subject: Re: chars method


Thanks Brian

GG


Brian Candler wrote:
> George George wrote:
>> Any ideas why this code returns :
>> undefined method `chars' for "mystring":String (NoMethodError)
> 
> Sure - it's because ruby 1.8 has no instance method called "chars" in 
> the String class.
> 
> Use "ri String" to get a list of methods in String, or look at the API 
> reference.
> 
> However, there is such a method in ruby 1.9:
> 
> $ irb19
> irb(main):001:0> "abcde".chars
> => #<Enumerator:0x83b9af4>
> irb(main):002:0> "abcde".chars.to_a
> => ["a", "b", "c", "d", "e"]
> 
> In ruby 1.8, you could use each_byte to iterate over the bytes, but this 
> will give the numeric value for each one.
> 
> irb(main):001:0> require 'enumerator'
> => true
> irb(main):002:0> "abcde".to_enum(:each_byte).to_a
> => [97, 98, 99, 100, 101]
> 
> (Also, note that ruby 1.9 has a different concept of "character" which 
> understands multi-byte characters and encodings)
> 
> Here's another approach which should work in both 1.8 and 1.9:
> 
> irb(main):003:0> "abcde".split(//)
> => ["a", "b", "c", "d", "e"]

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