Re: Sorting strings
- To: mathgroup at smc.vnet.net
- Subject: [mg123138] Re: Sorting strings
- From: Ulrich Arndt <ulrich.arndt at data2knowledge.de>
- Date: Thu, 24 Nov 2011 06:57:38 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201111231207.HAA14969@smc.vnet.net>
I personally see benefits in equal length strings here but
Clear[getNumber]
getNumber[x_String] :=
ToExpression[StringCases[x, y : DigitCharacter .. -> y][[1]]];
Sort[list, getNumber[#1] < getNumber[#2] &]
should do
Ulrich
Am 23.11.2011 um 13:07 schrieb Themis Matsoukas:
> Sorting this list of strings
>
> {"a1", "a2", "a20", "a12"} // Sort
>
> I get
>
> {"a1", "a12", "a2", "a20"}
>
> but I would like the numerals to be sorted as numbers, i.e., as
>
> {"a1", "a2", "a12", "a20"}
>
> Is this possible or do I have to rename "a1" into "a01" etc?
>
> Thanks
>
> Themis
>
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Ulrich Arndt
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- References:
- Sorting strings
- From: Themis Matsoukas <tmatsoukas@me.com>
- Sorting strings