what is "?" in ruby

Question

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

Ruby 1.9

irb(main):001:0> ?c
=> "c"

Ruby 1.8.6

 irb(main):001:0> ?c
 => 99

what does "?" mean ?

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1 Answer

深蓝 · Answer 1 · 2021-10-16T22:32:24+0000

It denotes a "character". In ruby 1.8, this was represented by the ascii-code of the character. In Ruby 1.9, it's a single-character String.