Ruby/String/char range
Материал из Wiki.crossplatform.ru
Содержание |
iterate over all the characters using a block
thoreau = "asdfasdfasdf" thoreau.each_byte do |c| print c.chr, "/" end
Range indexes are negative
#!/usr/bin/env ruby thoreau = "If a man does not keep pace with his companions, perhaps it is because he hears a different drummer." puts thoreau[-8..-2] # => "drummer"
Retrieve part of a string with the [] method, using a range.
thoreau = "qwerqwerqwerqwerqwer" puts thoreau[7..9]
starting at the end of the string using negative numbers, get the second to last character through the eighth to last
thoreau = "asdfasdfasdfadsfasdfasdfadsf" puts thoreau[-8..-2]
