Ruby — Set variable to main with eval

RUBY.md

Ruby — Set variable to main with eval

Example

set variable in main

alice = nil

binding and eval

binding.eval('alice = "liddle"')

variable binded to main

p alice # "liddle"

Ref

• Class: Binding (Ruby 2.4.2)

Versions

• ruby 2.4.2p198 (2017-09-14 revision 59899) [x86_64-darwin16]

Links

• Qiita—Japanese
• Medium—Imported

xample.rb

#!/usr/bin/env ruby

alice = nil

binding.eval('alice = "liddle"')

p alice # "liddle"