What is the purpose of the question mark operator in Ruby?
Sometimes it appears like this:
assert !product.valid?
sometimes it’s in an if construct.
What is the purpose of the question mark operator in Ruby? Sometimes it appears
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What is the purpose of the question mark operator in Ruby?
Sometimes it appears like this:
assert !product.valid?
sometimes it’s in an if construct.
It is a code style convention; it indicates that a method returns a boolean value (true or false) or an object to indicate a true value (or “truthy” value).
The question mark is a valid character at the end of a method name.
https://docs.ruby-lang.org/en/2.0.0/syntax/methods_rdoc.html#label-Method+Names