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

instance method

Hash#<

hash < other_hash → true or false

static VALUE
rb_hash_lt(VALUE hash, VALUE other)
{
    other = to_hash(other);
    if (RHASH_SIZE(hash) >= RHASH_SIZE(other)) return Qfalse;
    return hash_le(hash, other);
}

Returns true if hash is a proper subset of other_hash, false otherwise:

Example

h1 = {foo: 0, bar: 1}
h2 = {foo: 0, bar: 1, baz: 2}
h1 < h2 # => true
h2 < h1 # => false
h1 < h1 # => false

See also #<= .try_convert .ruby2_keywords_hash? #== also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

‹ prev.try_convert next ›#<=