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From: Joshua Landau <joshua.landau.ws@gmail.com>
Date: Thu, 27 Dec 2012 01:13:11 +0000
Subject: Re: Custom alphabetical sort
To: d@davea.name
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On 25 December 2012 06:18, Dave Angel <d@davea.name> wrote:

> On 12/24/2012 06:19 PM, Pander Musubi wrote:

 <snip>

>  > Thanks very much for this efficient code.
>
> Perhaps you missed Ian Kelly's correction of Thomas Bach's approach:
>
> d = { k: v for v, k in enumerate(cs) }
>
>
> def collate(x):
>     return list(map(d.get, x))
>
> sorted(data, key=collate)
>
> I'd use Ian Kelly's approach.


Well, he was first to it :P


> It's not only more compact,


I take offence* here! The only difference was "list(map(d.get, x))" vs
"[hashindex[s] for s in string]" (11 chars) and my longer naming scheme. If
you really care enough about those to sway your judgement, shame on you! ;)

* Not really

it shouldn't
> give an exception for a character not in the table.


That was a choice, not a bug. I didn't want undefined behaviour, so I
thought I'd leave it to crash on "bad" input than sort in a way that may be
unwanted. Even Ian Kelly gave this as way of coding it.


> At least, not for
> Python 2.x.  I'm not sure about Python 3, since it can give an exception
> comparing None to int.



Please not that this post was done in humour (but with truth) to delay
sleep. No offence to Ian or you intended ;).

Happy After-Christmas!

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<div dir=3D"ltr">On 25 December 2012 06:18, Dave Angel <span dir=3D"ltr">&l=
t;<a href=3D"mailto:d@davea.name" target=3D"_blank">d@davea.name</a>&gt;</s=
pan> wrote:<br><div class=3D"gmail_extra"><div class=3D"gmail_quote"><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-w=
idth:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding=
-left:1ex">

On 12/24/2012 06:19 PM, Pander Musubi wrote: </blockquote><div style>=A0&lt=
;snip&gt;</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-lef=
t-style:solid;padding-left:1ex">

<div class=3D"im">
&gt; Thanks very much for this efficient code.<br>
<br>
</div>Perhaps you missed Ian Kelly&#39;s correction of Thomas Bach&#39;s ap=
proach:<br>
<div class=3D"im"><br>
d =3D { k: v for v, k in enumerate(cs) }<br>
<br>
<br>
</div><div class=3D"im">def collate(x):<br>
=A0 =A0 return list(map(d.get, x))<br>
<br>
sorted(data, key=3Dcollate)<br>
<br>
</div>I&#39;d use Ian Kelly&#39;s approach.</blockquote><div><br></div><div=
 style>Well, he was first to it :P</div><div>=A0<br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;bo=
rder-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">

It&#39;s not only more compact,</blockquote><div><br></div><div style>I tak=
e offence* here! The only difference was &quot;list(map(d.get, x))&quot; vs=
 &quot;[hashindex[s] for s in string]&quot; (11 chars) and my longer naming=
 scheme. If you really care enough about those to sway your judgement, sham=
e on you! ;)</div>

<div style><br></div><div style>* Not really</div><div style><br></div><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;paddi=
ng-left:1ex">

it shouldn&#39;t<br>
give an exception for a character not in the table.</blockquote><div><br></=
div><div style>That was a choice, not a bug. I didn&#39;t want undefined be=
haviour, so I thought I&#39;d leave it to crash on &quot;bad&quot; input th=
an sort in a way that may be unwanted. Even Ian Kelly gave this as way of c=
oding it.</div>

<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left=
-style:solid;padding-left:1ex">At least, not for<br>
Python 2.x. =A0I&#39;m not sure about Python 3, since it can give an except=
ion<br>
comparing None to int.</blockquote><div><br></div><div><br></div><div style=
>Please not that this post was done in humour (but with truth) to delay sle=
ep. No=A0offence=A0to Ian or you intended ;).</div><div style><br></div><di=
v style>

Happy After-Christmas!</div></div></div></div>

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