Re: Position different in 5.0 and 5.1?
- To: mathgroup at smc.vnet.net
- Subject: [mg56107] Re: [mg56057] Position different in 5.0 and 5.1?
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Fri, 15 Apr 2005 04:48:19 -0400 (EDT)
- Reply-to: hanlonr at cox.net
- Sender: owner-wri-mathgroup at wolfram.com
Help states that StringTake was modified in 5.1
Position[{"asd","dsa"},
x_String/;(StringTake[x,1]=="a")]
{{1}}
Position[{"asd","dsa"},
_String?(StringTake[#,1]=="a"&)]
{{1}}
Position[StringTake[{"asd","dsa"},1],"a"]
{{1}}
Bob Hanlon
>
> From: "J R Gog" <jrg20 at cam.ac.uk>
To: mathgroup at smc.vnet.net
> Date: 2005/04/14 Thu AM 08:55:35 EDT
> To: mathgroup at smc.vnet.net
> Subject: [mg56107] [mg56057] Position different in 5.0 and 5.1?
>
>
> I've recently upgraded from 5.1 from 5.0 and have found that some of my
old
> notebooks don't seem to work. I think I have the essence of what I'm utterly
> confussed about in this example:
> Position[{"asd", "dsa"}, x_ /; (StringTake[x, 1] == "a")]
>
> What I want is the position of list entries which have first character "a".
> In 5.0, this line works. In 5.1, I get an error that StringTake is being fed
> a string.
>
> I can't find any documentation that explains what has changed to have this
> effect. I'm sure I've missed something obvious, but if anyone can explain to
> me what has changed, it would be very helpful indeed. I know I can do
> everything some other way, but I need to know exactly what old stuff I need
> to change!
>
>
>
> Thanks
>
>
>
> Julia Gog
>
>
>