class Object
Public Instance Methods
find_only() { |item| ... }
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# File lib/enumerable/find_only.rb, line 7 def find_only if block_given? already_seen = false result = nil each do |item| if yield(item) if already_seen raise EnumerableFindOnly::TooManyItems else result = item already_seen = true end end end result else items = take(2) if items.length > 1 raise EnumerableFindOnly::TooManyItems end items[0] end end