Hash#hash

() -> ::Integer

hash.hash → an_integer

static VALUE
rb_hash_hash(VALUE hash)
{
    st_index_t size = RHASH_SIZE(hash);
    st_index_t hval = rb_hash_start(size);
    hval = rb_hash_uint(hval, (st_index_t)rb_hash_hash);
    if (size) {
        rb_hash_foreach(hash, hash_i, (VALUE)&hval);
    }
    hval = rb_hash_end(hval);
    return ST2FIX(hval);
}

Returns the Integer hash-code for the hash.

Two Hash objects have the same hash-code if their content is the same (regardless of order):

Example

h1 = {foo: 0, bar: 1, baz: 2}
h2 = {baz: 2, bar: 1, foo: 0}
h2.hash == h1.hash # => true
h2.eql? h1 # => true

See also #flatten #has_key? #filter! #has_value? also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0

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