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MathGroup Archive 2004

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Re: Re: trimming a string

  • To: mathgroup at smc.vnet.net
  • Subject: [mg50884] Re: [mg50873] Re: [mg50861] trimming a string
  • From: DrBob <drbob at bigfoot.com>
  • Date: Sun, 26 Sep 2004 05:31:45 -0400 (EDT)
  • References: <200409250555.BAA05042@smc.vnet.net> <opsevjb0t7iz9bcq@monster.cox-internet.com>
  • Reply-to: drbob at bigfoot.com
  • Sender: owner-wri-mathgroup at wolfram.com

Here's one more solution. One of the others required ReplaceRepeated and the other needed Split; this avoids both. I'm not sure which of the three is fastest.

s="   abcdefgh   ";
StringJoin[Characters@s/.{" "..,x__}/;First@{x}!=" "->{x}
   /.{x__," "..}/;Last@{x}!=" "->{x}]//FullForm

"abcdefgh"

Bobby

On Sat, 25 Sep 2004 03:32:14 -0500, DrBob <drbob at bigfoot.com> wrote:

> s="   abcdefgh   ";
> StringJoin[Characters@s//.{{" "..,x__}->{x},{x__," "..}->{x}}]//FullForm
>
> "abcdefgh"
>
> or
>
> StringJoin@Flatten[Split@Characters@s/.{{" "..},x__}->{x}/.{x__,{" "..}}->{x}]//FullForm
>
> "abcdefgh"
>
> Bobby
>
> On Sat, 25 Sep 2004 01:55:13 -0400 (EDT), David Park <djmp at earthlink.net> wrote:
>
>> Akos,
>>
>> One method...
>>
>> trimString[s_String] :=
>>   Module[{ss = s},
>>     While[First@Characters[ss] === " ", ss = StringDrop[ss, 1]];
>>     While[Last@Characters[ss] === " ", ss = StringDrop[ss, -1]];
>>     ss]
>>
>> s = "   abcdefgh   ";
>> trimString[s] // FullForm
>> "abcdefgh"
>>
>> David Park
>> djmp at earthlink.net
>> http://home.earthlink.net/~djmp/
>>
>>
>> From: Akos Beleznay [mailto:abeleznay at equitas-capital.com]
To: mathgroup at smc.vnet.net
>>
>> I would appreciate if somebody could show me a simple way of trimming a
>> string. (I did it a hard way, but suspect an elegant solution.)
>>
>> Trim(a_string): returns a copy of a string without leading and trailing
>> spaces.
>>
>> thanks for your help,
>>
>> Akos Beleznay
>> Equitas Capital Advisors LLC
>> 909 Poydras Street
>> Suite 1850
>> New Orleans, LA 70112
>> Phone: (504) 569-9607
>> Fax: (504) 569-9650
>> abeleznay at equitas-capital.com
>>
>>
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>>
>>
>>
>>
>>
>
>
>



-- 
DrBob at bigfoot.com
www.eclecticdreams.net



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