From: matz@... Date: 2016-07-19T06:20:33+00:00 Subject: [ruby-core:76413] [Ruby trunk Feature#12350] Introduce Array#find! that raises an error if element not found Issue #12350 has been updated by Yukihiro Matsumoto. I am not against adding a method that raises an exception, but `find!` is not a proper name for it. Besides that, we can raise an exception for non-existing values by the current behavior. So let us start improving documentation. Daniel, could you create an PR? Matz. ---------------------------------------- Feature #12350: Introduce Array#find! that raises an error if element not found https://bugs.ruby-lang.org/issues/12350#change-59653 * Author: Andrey Koleshko * Status: Open * Priority: Normal * Assignee: ---------------------------------------- It would be great to have some function (like `Hash#fetch`) for `Array` that raises an exception if element not found by passed block in `find`. For example: ~~~ [].find! { |el| el == 1 } => ElementError: element not found ~~~ I just noticed that there are many cases when it's needed to raise an exception (because this is exceptional situation) if an element not found. Currently I just define methods like this one: ~~~ def find_price!(size) found_price = prices.find { |p| p.key == size } fail "Price for #{size} not found" unless found_price found_price end ~~~ -- https://bugs.ruby-lang.org/ Unsubscribe: