End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Hash#size

hash.size → integer

VALUE
rb_hash_size(VALUE hash)
{
    return INT2FIX(RHASH_SIZE(hash));
}

Returns the count of entries in self:

Example

{foo: 0, bar: 1, baz: 2}.length # => 3

See also #shift #slice #select! #store also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0