Find & Replace Question

[inpuarg]

I want to find a & character using Regex. But not &&
How can i manage this in c# Quickfind window ?
--------------------------------------------------
ne kadar yaþarsan yaþa
sevdiðin kadardýr ömrün :(
--------------------------------------------------

[Dave Sexton]

Hi,

Then just use a single "&".

"&" isn't a special character in Regular Expressions.

--
Dave Sexton

"inpuarg" <in*****@wherel and.comwrote in message
news:6r******** *************** *********@4ax.c om...

>I want to find a & character using Regex. But not &&
How can i manage this in c# Quickfind window ?
--------------------------------------------------
ne kadar yaþarsan yaþa
sevdiðin kadardýr ömrün :(
--------------------------------------------------

[inpuarg]

ok. ut the problem is , when i 've searched for & character it finds
me every && chatacters also. and i 'm not interested in with this.
There are millions of in logical operations. i 'm interested in with
single & .

On Sat, 2 Dec 2006 06:40:06 -0500, "Dave Sexton"
<dave@jwa[remove.this]online.comwrote :

>Hi,

Then just use a single "&".

"&" isn't a special character in Regular Expressions.

--------------------------------------------------
ne kadar yaþarsan yaþa
sevdiðin kadardýr ömrün :(
--------------------------------------------------

[Dave Sexton]

Hi,

Sorry - I misunderstood.

I don't think that's possible though. There doesn't appear to be any
negative look-ahead assertion in VS 2005's version of Regex:

"Regular Expressions (Visual Studio)"
http://msdn2.microsoft.com/en-us/lib...cs(VS.80).aspx

--
Dave Sexton

"inpuarg" <in*****@wherel and.comwrote in message
news:iu******** *************** *********@4ax.c om...

ok. ut the problem is , when i 've searched for & character it finds
me every && chatacters also. and i 'm not interested in with this.
There are millions of in logical operations. i 'm interested in with
single & .

On Sat, 2 Dec 2006 06:40:06 -0500, "Dave Sexton"
<dave@jwa[remove.this]online.comwrote :

>>Hi,

Then just use a single "&".

"&" isn't a special character in Regular Expressions.

--------------------------------------------------
ne kadar yaþarsan yaþa
sevdiðin kadardýr ömrün :(
--------------------------------------------------

[Lee]

The following untested RegExp might work:

[~&]&[~&]

It should find an & that is neither preceded nor followed by an &.

--
// Lee Silver
// Information Concepts Inc.

inpuarg wrote:

I want to find a & character using Regex. But not &&
How can i manage this in c# Quickfind window ?
--------------------------------------------------
ne kadar yaþarsan yaþa
sevdiðin kadardýr ömrün :(
--------------------------------------------------

[Dave Sexton]

Hi Lee,

Good idea (incorrect syntax though). Based off that pattern I got this to
work:

&~([&:b])

However, it will match the last "&" in "&&" when it's not immediately
followed by a space or tab. In other words, the pattern matches "&", and
the last "&" in "&&", but not, "&& ".

I thought it might be acceptable since it's common for && to be followed by
at least one space in code. If you can't guarantee that, then the pattern
will not work for you.

Just FYI,

[^&]&[^&] and ~(&)&~(&)

didn't work for me, unfortunately.

HTH

--
Dave Sexton

"Lee" <ls*****@inform ation-concepts.comwro te in message
news:11******** **************@ 16g2000cwy.goog legroups.com...
The following untested RegExp might work:

[~&]&[~&]

It should find an & that is neither preceded nor followed by an &.

--
// Lee Silver
// Information Concepts Inc.

inpuarg wrote:

I want to find a & character using Regex. But not &&
How can i manage this in c# Quickfind window ?
--------------------------------------------------
ne kadar yaþarsan yaþa
sevdiðin kadardýr ömrün :(
--------------------------------------------------

[Lee]

Dave:

Yeah, on the syntax, ~ should have been ^ -- that's what I get for
posting un-tested code.

OTOH, I just tried [^&]&[^&] and it works as advertised -- it finds &'s
that are not also &&'s. This works in VS 2005; but I don't know about
VS2003.

Based on what the OP wanted, I would probably modify the RE to
[^&]&[^=&] in order to bypass the &= operator.

--
// Lee Silver
// Information Concepts Inc.
Dave Sexton wrote:

Hi Lee,

Good idea (incorrect syntax though). Based off that pattern I got this to
work:

&~([&:b])

However, it will match the last "&" in "&&" when it's not immediately
followed by a space or tab. In other words, the pattern matches "&", and
the last "&" in "&&", but not, "&& ".

I thought it might be acceptable since it's common for && to be followed by
at least one space in code. If you can't guarantee that, then the pattern
will not work for you.

Just FYI,

[^&]&[^&] and ~(&)&~(&)

didn't work for me, unfortunately.

HTH

--
Dave Sexton

"Lee" <ls*****@inform ation-concepts.comwro te in message
news:11******** **************@ 16g2000cwy.goog legroups.com...
The following untested RegExp might work:

[~&]&[~&]

It should find an & that is neither preceded nor followed by an &.

--
// Lee Silver
// Information Concepts Inc.

inpuarg wrote:

I want to find a & character using Regex. But not &&
How can i manage this in c# Quickfind window ?
--------------------------------------------------
ne kadar yaþarsan yaþa
sevdiðin kadardýr ömrün :(
--------------------------------------------------

[Dave Sexton]

Hi Lee,

I'm suprised that works for you. I'm using VS 2005 as well and it doesn't
work for me. Actually, both of the examples that didn't work for me matched
absolutely nothing at all - not even a single "&".

I just tested it again. When I tested it the first time I just typed &'s
and &&'s (and some with trailing spaces) along the left margin of an empty
document, one per line. Apparently, [^&]&[^&] only works if there is some
combination of characters before the "&", even if it's whitespace, but it
doesn't just match "&" it makes the whitespace around it as well.

So, for instance, the resulting match would be " & ", not "&".

Also, it's kinda buggy. If I enter "&" along the left margin it doesn't
match. Then, if I insert whitespace before it, other than &'s, it still
doesn't match! I have to delete it and enter some strange combination of
tabs, spaces and characters before it first, then type &, and then it will
match. But even that doesn't work every time, although it seems to find " &
" in "if ((0 & 1) == 0)" with no problem :)

--
Dave Sexton

"Lee" <ls*****@inform ation-concepts.comwro te in message
news:11******** **************@ j72g2000cwa.goo glegroups.com.. .
Dave:

Yeah, on the syntax, ~ should have been ^ -- that's what I get for
posting un-tested code.

OTOH, I just tried [^&]&[^&] and it works as advertised -- it finds &'s
that are not also &&'s. This works in VS 2005; but I don't know about
VS2003.

Based on what the OP wanted, I would probably modify the RE to
[^&]&[^=&] in order to bypass the &= operator.

--
// Lee Silver
// Information Concepts Inc.
Dave Sexton wrote:

Hi Lee,

Good idea (incorrect syntax though). Based off that pattern I got this to
work:

&~([&:b])

However, it will match the last "&" in "&&" when it's not immediately
followed by a space or tab. In other words, the pattern matches "&", and
the last "&" in "&&", but not, "&& ".

I thought it might be acceptable since it's common for && to be followed
by
at least one space in code. If you can't guarantee that, then the pattern
will not work for you.

Just FYI,

[^&]&[^&] and ~(&)&~(&)

didn't work for me, unfortunately.

HTH

--
Dave Sexton

"Lee" <ls*****@inform ation-concepts.comwro te in message
news:11******** **************@ 16g2000cwy.goog legroups.com...
The following untested RegExp might work:

[~&]&[~&]

It should find an & that is neither preceded nor followed by an &.

--
// Lee Silver
// Information Concepts Inc.

inpuarg wrote:

I want to find a & character using Regex. But not &&
How can i manage this in c# Quickfind window ?
--------------------------------------------------
ne kadar yaþarsan yaþa
sevdiðin kadardýr ömrün :(
--------------------------------------------------

[Lee]

Dave:

My RE will not find a single & that is in the left or right margin --
but in dealing with realistically entered code, the chances of one in
the left margin I think are nil; and as the right-most character only
marginally bigger.

I haven't tried it, but I don't see why it wouldn't match the string "
& " -- it should match any & preceded and followed by a non-&. OTOH, as
you say, the match will hi-light 3 characters because the RE matches 3
characters. For just doing a search, hi-lighting 3 characters should
not be a problem; and even if doing a Replace, specifying \1 and \2 in
the replacment string (and enclosing each [^&] in the RE in braces
thusly {[^&]}) would be no problem.

On the real code against which I ran the RE it found all single &'s and
skipped all &&'s.

--
// Lee Silver
// Information Concepts Inc.

Dave Sexton wrote:

Hi Lee,

I'm suprised that works for you. I'm using VS 2005 as well and it doesn't
work for me. Actually, both of the examples that didn't work for me matched
absolutely nothing at all - not even a single "&".

I just tested it again. When I tested it the first time I just typed &'s
and &&'s (and some with trailing spaces) along the left margin of an empty
document, one per line. Apparently, [^&]&[^&] only works if there is some
combination of characters before the "&", even if it's whitespace, but it
doesn't just match "&" it makes the whitespace around it as well.

So, for instance, the resulting match would be " & ", not "&".

Also, it's kinda buggy. If I enter "&" along the left margin it doesn't
match. Then, if I insert whitespace before it, other than &'s, it still
doesn't match! I have to delete it and enter some strange combination of
tabs, spaces and characters before it first, then type &, and then it will
match. But even that doesn't work every time, although it seems to find " &
" in "if ((0 & 1) == 0)" with no problem :)

--
Dave Sexton

"Lee" <ls*****@inform ation-concepts.comwro te in message
news:11******** **************@ j72g2000cwa.goo glegroups.com.. .
Dave:

Yeah, on the syntax, ~ should have been ^ -- that's what I get for
posting un-tested code.

OTOH, I just tried [^&]&[^&] and it works as advertised -- it finds &'s
that are not also &&'s. This works in VS 2005; but I don't know about
VS2003.

Based on what the OP wanted, I would probably modify the RE to
[^&]&[^=&] in order to bypass the &= operator.

--
// Lee Silver
// Information Concepts Inc.
Dave Sexton wrote:

Hi Lee,

Good idea (incorrect syntax though). Based off that pattern I got thisto
work:

&~([&:b])

However, it will match the last "&" in "&&" when it's not immediately
followed by a space or tab. In other words, the pattern matches "&", and
the last "&" in "&&", but not, "&& ".

I thought it might be acceptable since it's common for && to be followed
by
at least one space in code. If you can't guarantee that, then the pattern
will not work for you.

Just FYI,

[^&]&[^&] and ~(&)&~(&)

didn't work for me, unfortunately.

HTH

--
Dave Sexton

"Lee" <ls*****@inform ation-concepts.comwro te in message
news:11******** **************@ 16g2000cwy.goog legroups.com...
The following untested RegExp might work:

[~&]&[~&]

It should find an & that is neither preceded nor followed by an &.

--
// Lee Silver
// Information Concepts Inc.

inpuarg wrote:

I want to find a & character using Regex. But not &&
How can i manage this in c# Quickfind window ?
--------------------------------------------------
ne kadar yaþarsan yaþa
sevdiðin kadardýr ömrün :(
--------------------------------------------------

[Dave Sexton]

Hi Lee,

I haven't tried it, but I don't see why it wouldn't match the string " & "

Actually, I wrote that it was matching " & " - and that it was a problem.

But your addendum will probably work.

--
Dave Sexton

"Lee" <ls*****@inform ation-concepts.comwro te in message
news:11******** **************@ l12g2000cwl.goo glegroups.com.. .
Dave:

My RE will not find a single & that is in the left or right margin --
but in dealing with realistically entered code, the chances of one in
the left margin I think are nil; and as the right-most character only
marginally bigger.

I haven't tried it, but I don't see why it wouldn't match the string "
& " -- it should match any & preceded and followed by a non-&. OTOH, as
you say, the match will hi-light 3 characters because the RE matches 3
characters. For just doing a search, hi-lighting 3 characters should
not be a problem; and even if doing a Replace, specifying \1 and \2 in
the replacment string (and enclosing each [^&] in the RE in braces
thusly {[^&]}) would be no problem.

On the real code against which I ran the RE it found all single &'s and
skipped all &&'s.

--
// Lee Silver
// Information Concepts Inc.

Dave Sexton wrote:

Hi Lee,

I'm suprised that works for you. I'm using VS 2005 as well and it doesn't
work for me. Actually, both of the examples that didn't work for me
matched
absolutely nothing at all - not even a single "&".

I just tested it again. When I tested it the first time I just typed &'s
and &&'s (and some with trailing spaces) along the left margin of an empty
document, one per line. Apparently, [^&]&[^&] only works if there is some
combination of characters before the "&", even if it's whitespace, but it
doesn't just match "&" it makes the whitespace around it as well.

So, for instance, the resulting match would be " & ", not "&".

Also, it's kinda buggy. If I enter "&" along the left margin it doesn't
match. Then, if I insert whitespace before it, other than &'s, it still
doesn't match! I have to delete it and enter some strange combination of
tabs, spaces and characters before it first, then type &, and then it will
match. But even that doesn't work every time, although it seems to find "
&
" in "if ((0 & 1) == 0)" with no problem :)

--
Dave Sexton

"Lee" <ls*****@inform ation-concepts.comwro te in message
news:11******** **************@ j72g2000cwa.goo glegroups.com.. .
Dave:

Yeah, on the syntax, ~ should have been ^ -- that's what I get for
posting un-tested code.

OTOH, I just tried [^&]&[^&] and it works as advertised -- it finds &'s
that are not also &&'s. This works in VS 2005; but I don't know about
VS2003.

Based on what the OP wanted, I would probably modify the RE to
[^&]&[^=&] in order to bypass the &= operator.

--
// Lee Silver
// Information Concepts Inc.
Dave Sexton wrote:

Hi Lee,

Good idea (incorrect syntax though). Based off that pattern I got this
to
work:

&~([&:b])

However, it will match the last "&" in "&&" when it's not immediately
followed by a space or tab. In other words, the pattern matches "&",
and
the last "&" in "&&", but not, "&& ".

I thought it might be acceptable since it's common for && to be followed
by
at least one space in code. If you can't guarantee that, then the
pattern
will not work for you.

Just FYI,

[^&]&[^&] and ~(&)&~(&)

didn't work for me, unfortunately.

HTH

--
Dave Sexton

"Lee" <ls*****@inform ation-concepts.comwro te in message
news:11******** **************@ 16g2000cwy.goog legroups.com...
The following untested RegExp might work:

[~&]&[~&]

It should find an & that is neither preceded nor followed by an &.

--
// Lee Silver
// Information Concepts Inc.

inpuarg wrote:

I want to find a & character using Regex. But not &&
How can i manage this in c# Quickfind window ?
--------------------------------------------------
ne kadar yaþarsan yaþa
sevdiðin kadardýr ömrün :(
--------------------------------------------------