method

each_key

v1_9_3_392 - Show latest stable - 0 notes - Class: Hash

each_key() public

Calls block once for each key in hsh, passing the key as a parameter.

If no block is given, an enumerator is returned instead.

h = { "a" => 100, "b" => 200 }
h.each_key {|key| puts key }

produces:

a
b

Show source

static VALUE
rb_hash_each_key(VALUE hash)
{
    RETURN_ENUMERATOR(hash, 0, 0);
    rb_hash_foreach(hash, each_key_i, 0);
    return hash;
}