Backspace in strings and patterns

rubyonrails-talk
1

Interesting. Not what I expected. This is Ruby 1.8.6.

irb

irb(main):001:0> str = "abx\bc" => "abx\bc" irb(main):002:0> str.length => 5 irb(main):003:0> s = str.sub(/.\b/, '') => "ab\bc" irb(main):004:0> s.length => 4 irb(main):005:0> s = str.sub(/.\x08/, '') => "abc" irb(main):006:0> s.length => 3 irb(main):007:0>

Backspace character representation in ASCII, UTF-8, etc. is 8.

Jeffrey

2

Interesting. Not what I expected. This is Ruby 1.8.6.

Inside a rexexp, \b is not a backspace (except in a character class). it means word boundary.

Fred