End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Range#===

self === object → true or false

static VALUE
range_eqq(VALUE range, VALUE val)
{
    VALUE ret = range_string_cover_internal(range, val);
    if (!UNDEF_P(ret)) return ret;
    return r_cover_p(range, RANGE_BEG(range), RANGE_END(range), val);
}

Returns true if object is between self.begin and self.end. false otherwise:

Example

(1..4) === 2       # => true
(1..4) === 5       # => false
(1..4) === 'a'     # => false
(1..4) === 4       # => true
(1...4) === 4      # => false
('a'..'d') === 'c' # => true
('a'..'d') === 'e' # => false

A case statement uses method ===, and so:

Example

case 79
when (1..50)
  "low"
when (51..75)
  "medium"
when (76..100)
  "high"
end # => "high"

case "2.6.5"
when ..."2.4"
  "EOL"
when "2.4"..."2.5"
  "maintenance"
when "2.5"..."3.0"
  "stable"
when "3.1"..
  "upcoming"
end # => "stable"

See also #== #as_json #% #begin also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

‹ prev#== next ›#as_json