Add Question Mark Operator as a ruby til.

2026-01-03 07:08:01 +00:00 · 2015-07-03 15:52:37 -05:00
parent 287316b506
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+# Question Mark Operator
+
+Ruby has a question mark (`?`) operator that works like so
+
+```ruby
+> ?a
+=> "a"
+> ?\s
+=> " "
+> ??
+=> "?"
+> ?a + ?b + ?c
+=> "abc"
+```
+
+It essentially creates single character strings. At least in Ruby 1.9+ it
+does. In versions of Ruby before 1.9, the `?` operator could be used to get
+the ascii character code of the operand character.
+
+h/t Josh Davey
+
+[source](http://stackoverflow.com/questions/16641205/what-does-the-question-mark-operator-do)