Ruby Hash check is subset?

Question

How can I tell if if a Ruby hash is a subset of (or includes) another hash?

For example:

hash = {a: 1, b: 2, c: 3, d: 4, e: 5, f: 6, g: 7}
hash.include_hash?({})            # true
hash.include_hash?({f: 6, c: 3})  # true
hash.include_hash?({f: 6, c: 1})  # false

Answer 1

Since Ruby 2.3 you can also do the following to check if this is a subset

hash = {a: 1, b: 2, c: 3, d: 4, e: 5, f: 6, g: 7}
{} <= hash           # true
{f: 6, c: 3} <= hash # true
{f: 6, c: 1} <= hash # false