Class: String

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/String/each_char.rb,
lib/String/each.rb,
lib/String/grep.rb,
lib/String/each_line.rb

Overview

Description: Ruby 1.9 no longer mixes in Enumerable, so there’s no #each method. Here’s the equivalent 1.8 version of String’s missing #each method, but renamed to describe it’s functionality more correctly. See String#each, which calls this method as the default behaviour. Also see String#each_char.

Instance Method Summary collapse

Instance Method Details

#each(unit = :line, &block) ⇒ Object 



13
14
15
16
17
18
 
# File 'lib/String/each.rb', line 13

def each(unit = :line, &block)
  case unit
  when :line; each_line(&block)
  when :char; each_char(&block)
  end
end

#each_char ⇒ Object 



10
11
12
 
# File 'lib/String/each_char.rb', line 10

def each_char
  (0..(self.size - 1)).each{|i| yield self[i, 1]}
end

#each_line ⇒ Object 



10
11
12
13
 
# File 'lib/String/each_line.rb', line 10

def each_line
  lines = self.split("\n")
  0.upto(lines.size - 1){|i| yield lines[i]}
end

#grep(pattern) ⇒ Object 



22
23
24
 
# File 'lib/String/grep.rb', line 22

def grep(pattern)
  self.select{|line| line =~ pattern}.join("\n")
end