Searching for a specifc item in array

Question

I have an array of objects and I need to find the last element that matches a specific condition. I tried to do it with each_reverse, but it ended up with too much of a code:

matching_item = nil items.reverse_each do |item| if (item.type_id == 10) matching_item = item break end end

Is it possible to make it shorter?

Justin Ko · Accepted Answer · 2012-08-27 21:06:53Z

5

Try:

matching_item = items.reverse.find{ |i| i.type_id == 10 }

edited Aug 27, 2012 at 21:06

answered Aug 27, 2012 at 20:19

Justin Ko

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Comments

Michael Berkowski · Accepted Answer · 2012-08-27 20:28:22Z

I would probably use Array#select and return the last match:

matching_item = items.select {|i| i.type_id == 10}.last

Leave off the .last if you decide you want all matches:

matching_items = items.select {|i| i.type_id == 10}

There are nice, though they search all the array and don't stop when the find the fitst matching element. Any way to to this?

steenslag · Accepted Answer · 2012-08-27 20:46:43Z

items.reverse_each.detect{|item| iterm.type_id == 10} #or items[items.rindex{|item| item.type_id == 10}]

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