Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →
instance method
Hash#has_key?
hash.has_key?(key) → true or false
hash.c
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VALUE
rb_hash_has_key(VALUE hash, VALUE key)
{
return RBOOL(hash_stlike_lookup(hash, key, NULL));
}
Alias of #include?
Returns true if key is a key in self, otherwise false.