From: "David A. Black" <dblack@...>
Date: 2008-04-12T04:37:04+09:00
Subject: Re: delete_if, select and (lack of) delete_if!, self.POLS == false

Hi --

On Sat, 12 Apr 2008, Saku Ytti wrote:

> On (2008-04-12 04:20 +0900), David A. Black wrote:
>
>> select is selecting all the even ones, and reject! is rejecting all
>> the odd ones, and in both cases, you're seeing the results (the array
>> with only the even ones; the array without the odd ones). In the case
>> of reject! you're also seeing that the contents of the array have been
>> replaced with the results of the reject operation.
>
> Are you talking about your example or my example? They did different thing,
> I'm not sure why your did what it did above.
>
>> I think if you want a reject operation whose return value is the same
>> as a select operation, you'll probably need to come up with a new
>> method name :-)
>
> The reject! in my example does mutable reject, as one would expect.
> But it also returns the non-rejected entries (that is, those entries that
> select for same block would return).

Having reject return the non-rejected entries is what I was referring
to. That's not how reject (with or without !) works, so if you want a
method that does that you'd want to find a different name for it.


David

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