Issue #14546 has been updated by rringler (Ryan Ringler). nobu (Nobuyoshi Nakada) wrote: > `Hash#delete` is destructive, so appending `!` doesn't seem making sense. I'm as guilty of it as anyone, but as I understand [`!` does not mean destructive](https://www.ruby-forum.com/topic/176830#773946), but rather 'more dangerous', which I believe a possible exception qualifies for. ---------------------------------------- Feature #14546: Hash#delete! https://bugs.ruby-lang.org/issues/14546#change-70640 * Author: rringler (Ryan Ringler) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- Hash#delete currently returns nil if a given key is not found in the hash. It would be nice to have a way to check that the key was present in the hash. This can be accomplished with with a block, but it would be nice to have some sugar for this. ~~~ ruby { a: 'a' }.delete(:b) # => nil { a: 'a' }.delete(:b) { |key| raise KeyError, "key not found #{key}" } # => KeyError (key not found: b) ~~~ I'd like to propose a Hash#delete! method: ~~~ruby { a: 'a' }.delete!(:a) # => 'a' { a: 'a' }.delete!(:b) # => KeyError (key not found: :b) ~~~ ---Files-------------------------------- hash_delete_bang.patch (2.37 KB) -- https://bugs.ruby-lang.org/ Unsubscribe: <mailto:ruby-core-request / ruby-lang.org?subject=unsubscribe> <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>