Rails: String#each_char

Documentation

Yields a single-character string for each character in the string. When $KCODE = ‘UTF8’, multi-byte characters are yielded appropriately.

Usage
The String#each_char method is nice for iterating through a string, one character at a time. I generally use regex for string manipulation; however, when context within the string matters, each_char is helpful.

Test

require 'rubygems'
require 'active_support'
require 'test/unit'
require 'dust'

unit_tests do
  test "each_char can be used to strip every other charater" do
    strip, result = true, ""
    "hello world".each_char do |char|
      result << char if strip
      strip = !strip
    end
    assert_equal "hlowrd", result
  end
end