Ruby » Ruby master

Feature #12350

Updated by ka8725 (Andrey Koleshko) almost 8 years ago

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 
 

 ~~~ 

Back