From: ka8725@... Date: 2016-05-05T13:30:01+00:00 Subject: [ruby-core:75368] [Ruby trunk Feature#12350] Introduce Array#find! that raises an error if element not found Issue #12350 has been updated by Andrey Koleshko. Victor Shepelev wrote: > I'm pretty unhappy that community/style guidelines are banning the straightforward and readable solution: > > ~~~ruby > prices.find { |p| p.key == size } or fail "Price for #{size} not found" > ~~~ I'm not aware about the banning. Could you elaborate what is bad in your example? Basically I don't see anything bad in your code except a little bit verbose like in mine solution. ---------------------------------------- Feature #12350: Introduce Array#find! that raises an error if element not found https://bugs.ruby-lang.org/issues/12350#change-58493 * 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: