Groups > comp.soft-sys.math.mathematica > #3475

Operations on RegularExpression matches

From	Jon Joseph <josco.jon@gmail.com>
Newsgroups	comp.soft-sys.math.mathematica
Subject	Operations on RegularExpression matches
Date	2011-07-04 10:47 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<ius5nq$2g4$1@smc.vnet.net> (permalink)

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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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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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