What's the opposite of chr() in Ruby?

What's the opposite of chr() in Ruby?

ruby ascii

ruby

How to get rid of non-ascii characters in ruby

ruby unicode cgi ascii

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Getting an ASCII character code in Ruby using `?` (question mark) fails

ruby char ascii

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Ruby 1.9 - invalid multibyte char (US-ASCII)

ruby ruby-on-rails-3 ascii

ruby

Rails 3 invalid multibyte char (US-ASCII)

ruby-on-rails ruby utf-8 ascii ruby-1.9

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Ruby: character to ascii from a string

ruby ascii

ruby

Convert string with hex ASCII codes to characters

ruby ascii

ruby

ASCII value of character in Ruby

ruby ascii character

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Why do I get a string encoding issue "\xE2" from ASCII-8BIT to UTF-8?

ruby-on-rails ruby string utf-8 ascii

ruby