if !¶
The !
operator returns a Bool
that results from negating the truthiness of a value.
When used in an if
in conjunction with a variable, is_a?
, responds_to?
or nil?
the compiler will restrict the types accordingly:
a = some_condition ? nil : 3
if !a
# here a is Nil because a is falsey in this branch
else
# here a is Int32, because a is truthy in this branch
end
b = some_condition ? 1 : "x"
if !b.is_a?(Int32)
# here b is String because it's not an Int32
end