On Apr 11, 2008, at 10:26 AM, Saku Ytti wrote:
> Hey everyone,
>
> I was looking today for version of Array#select that would mutate  
> the array
> by deleting selected elements from it.
> I first looked at delete_if, then noticed that it actually mutates  
> original
> array and returns mutated array. I wonder would it make sense for  
> delete_if
> not to mutate and return new array and delete_if! to mutate and  
> return deleted
> elements?
>
> Of course what I want is simple method to implement, it just seems  
> pretty
> typical desire for Array#select usage cases and also perhaps mutating
> delete_if is as well bit unexpected? Problem is, suggested change  
> would
> break many current delete_if usage cases.

a non-mutating delete_if is already there:

   array.select{|element| not orginal_condition(element)}

ie

   odds = [0,1,2,3].select{|i| not i.even?}

a @ http://codeforpeople.com/
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better. simply reflect on that.
h.h. the 14th dalai lama