From: serialhex <serialhex@...>
Date: 2012-04-14T12:34:23+09:00
Subject: Re: unable to do "down" range?

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On Apr 13, 2012 5:04 PM, "Ralph Shnelvar" <ralphs@dos32.com> wrote
...
> As I understand the code right now,
>
>  (1..10_000_000).last(5) # [9999996, 9999997, 9999998, 9999999, 10000000]
>
> will create a temporary array of ten million elements and then peel off
the last five array elements.
>
> Now from my perspective, having to allocate that relatively huge
temporary array is awful; truly Rube Goldberg-esque.
...

This can be done with lazy evaluation... take a look at haskell, though in
some ways it is the arch-nemesis of ruby, it is a very cool language with
some awesome features! And porting some of those features (like lazy eval)
would be pretty cool imho...

hex

snt frum my awesum ansroid... txt mite b rong

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<p>On Apr 13, 2012 5:04 PM, &quot;Ralph Shnelvar&quot; &lt;<a href=3D"mailt=
o:ralphs@dos32.com">ralphs@dos32.com</a>&gt; wrote<br>
...<br>
&gt; As I understand the code right now,<br>
&gt;<br>
&gt; =A0(1..10_000_000).last(5) # [9999996, 9999997, 9999998, 9999999, 1000=
0000]<br>
&gt;<br>
&gt; will create a temporary array of ten million elements and then peel of=
f the last five array elements.<br>
&gt;<br>
&gt; Now from my perspective, having to allocate that relatively huge tempo=
rary array is awful; truly Rube Goldberg-esque.<br>
...</p>
<p>This can be done with lazy evaluation... take a look at haskell, though =
in some ways it is the arch-nemesis of ruby, it is a very cool language wit=
h some awesome features! And porting some of those features (like lazy eval=
) would be pretty cool imho...</p>

<p>hex</p>
<p>snt frum my awesum ansroid... txt mite b rong <br>
</p>

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