instance method
Range#member?
(untyped obj) -> bool
include?(object) -> true or false
range.c
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static VALUE
range_include(VALUE range, VALUE val)
{
VALUE ret = range_include_internal(range, val);
if (!UNDEF_P(ret)) return ret;
return rb_call_super(1, &val);
}
Returns true if object is an element of self, false otherwise:
Example
(1..4).include?(2) # => true (1..4).include?(5) # => false (1..4).include?(4) # => true (1...4).include?(4) # => false ('a'..'d').include?('b') # => true ('a'..'d').include?('e') # => false ('a'..'d').include?('B') # => false ('a'..'d').include?('d') # => true ('a'...'d').include?('d') # => false
If begin and end are numeric, include? behaves like cover?
Example
(1..3).include?(1.5) # => true (1..3).cover?(1.5) # => true
But when not numeric, the two methods may differ:
Example
('a'..'d').include?('cc') # => false ('a'..'d').cover?('cc') # => true
Related: Range#cover?.