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Groups > comp.soft-sys.math.mathematica > #3484

Re: Operations on RegularExpression matches

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Try the following:

StringReplace[string, RegularExpression["(^.)"] :> ToUpperCase["$1"]]


On Mon, 04 Jul 2011 11:47:22 +0100, Jon Joseph <josco.jon@gmail.com> wrote:

> All:
>
> I have string of all lower case letters:
>
> 	string = "this is a string"
>
> I wish to capitalize the first letter:
>
> 	StringReplace[string, StartOfString ~~ x_ -> ToUpperCase[x]]  (* Does  
> want I want *)
>
> Now I try to do the same thing using RegularExpression:
>
> 	StringReplace[string, RegularExpression["(^.)"] -> ToUpperCase["$1"]]
>
> which fails (returns original string without capitalization).
>
> I know the match is occurring since
>
> 	StringReplace[string, RegularExpression["(^.)"] -> ToUpperCase["$1X"]]
>
> returns
>
> 	"tXhis is a string"
>
> What am I missing about using the matched part of a regular expression?
>
> Thanks.

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Thread

Operations on RegularExpression matches Jon Joseph <josco.jon@gmail.com> - 2011-07-04 10:47 +0000
  Re: Operations on RegularExpression matches "Oleksandr Rasputinov" <oleksandr_rasputinov@hmamail.com> - 2011-07-05 09:15 +0000
  Re: Operations on RegularExpression matches Albert Retey <awnl@gmx-topmail.de> - 2011-07-05 09:10 +0000

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