method
dig
ruby latest stable - Class:
Hash
dig(*args)public
Extracts the nested value specified by the sequence of key objects by calling dig at each step, returning nil if any intermediate step is nil.
h = { foo: {bar: {baz: 1}}} h.dig (:foo, :bar, :baz) #=> 1 h.dig (:foo, :zot, :xyz) #=> nil g = { foo: [10, 11, 12] } g.dig (:foo, 1) #=> 11 g.dig (:foo, 1, 0) #=> TypeError: Integer does not have #dig method g.dig (:foo, :bar) #=> TypeError: no implicit conversion of Symbol into Integer
VALUE
rb_hash_dig(int argc, VALUE *argv, VALUE self)
{
rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
self = rb_hash_aref(self, *argv);
if (!--argc) return self;
++argv;
return rb_obj_dig(argc, argv, self, Qnil);
}