Array#hash

() -> ::Integer

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 value (and will compare using eql?):

Example

['a', 'b'].hash == ['a', 'b'].hash # => true
['a', 'b'].hash == ['a', 'c'].hash # => false
['a', 'b'].hash == ['a'].hash      # => false

See also #freeze #include? #flatten! #index also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0