From: ara.t.howard@...
Date: 2007-03-03T12:42:00+09:00
Subject: Re: String.each

On Sat, 3 Mar 2007, Yannick Grams wrote:

> Hello all!
>
> I'm fairly new to Ruby, and I'm trying to write a program that looks at
> each character of a string and then processes it using a block. I've
> been using:
>
> String.each do
>   #block
> end
>
> but something isn't working. I'm sure that there is a simple answer, but
> I'm not that experienced with the language. If someone could please help
> me out, I'd greatly appreciate it.
>
> -- 
> Posted via http://www.ruby-forum.com/.

harp: ~> ri String#each
------------------------------------------------------------ String#each
      str.each(separator=$/) {|substr| block }        => str
      str.each_line(separator=$/) {|substr| block }   => str
------------------------------------------------------------------------
      Splits _str_ using the supplied parameter as the record separator
      (+$/+ by default), passing each substring in turn to the supplied
      block. If a zero-length record separator is supplied, the string is
      split on +\n+ characters, except that multiple successive newlines
      are appended together.

         print "Example one\n"
         "hello\nworld".each {|s| p s}
         print "Example two\n"
         "hello\nworld".each('l') {|s| p s}
         print "Example three\n"
         "hello\n\n\nworld".each('') {|s| p s}

      _produces:_

         Example one
         "hello\n"
         "world"
         Example two
         "hel"
         "l"
         "o\nworl"
         "d"
         Example three
         "hello\n\n\n"
         "world"


harp:~ > ruby -e'  puts String.instance_methods.grep(/each/)  '
each
each_with_index
each_line
each_byte


harp:~ > ruby -e'  "foobar".each_byte{|b| p b}  '
102
111
111
98
97
114


harp:~ > ruby -e'  "foobar".each_byte{|b| p b.chr}  '
"f"
"o"
"o"
"b"
"a"
"r"


-a
-- 
be kind whenever possible... it is always possible.
- the dalai lama