Array#hash

array.hash → integer

static VALUE
rb_ary_hash(VALUE ary)
{
    return rb_ary_hash_values(RARRAY_LEN(ary), RARRAY_CONST_PTR(ary));
}

Returns the integer hash value for self.

Two arrays with the same content will have the same hash code (and will compare using eql?):

Example

[0, 1, 2].hash == [0, 1, 2].hash # => true
[0, 1, 2].hash == [0, 1, 3].hash # => false

See also #flatten! #include? #flatten #index also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0