Replace only full words that matches oldValue and not when oldValue is a substring of a larger word

[Avi]

Hi all,

I'm using string Replace(string oldValue, string newValue) and would like it
to replace only full words that matches oldValue and not when oldValue is a
substring of a larger word.

How can it be done?

Thanks,
Avi

[Martin Honnen]

Re: Replace only full words that matches oldValue and not when oldValueis a substring of a larger word

Avi wrote:

I'm using string Replace(string oldValue, string newValue) and would like it
to replace only full words that matches oldValue and not when oldValue is a
substring of a larger word.
>
How can it be done?

In a regular expression pattern you can use \b to indicate a word
boundary so that this code

string example = "foo foobar barfoo foo";
string result = Regex.Replace(e xample, @"\bfoo\b", "baz");
Console.WriteLi ne(result);

outputs

baz foobar barfoo baz


--

Martin Honnen --- MVP XML

http://JavaScript.FAQTs.com/

[ThatsIT.net.au]

Re: Replace only full words that matches oldValue and not when oldValue is a substring of a larger word

Dim myText As String = "once upon a time in a small town"
Dim myNewText As String = String.Empty
Dim oldWord = "small"
Dim newWord = "large"
Dim words() As String = Split(myText, " ")

For Each word In words
myNewText += Replace(word, oldWord, newWord) & " "
Next

Response.Write( myNewText)

"Avi" <rememberoti@ya hoo.comwrote in message
news:%23R15$Wvz IHA.4004@TK2MSF TNGP03.phx.gbl. ..

Hi all,
>
I'm using string Replace(string oldValue, string newValue) and would like
it to replace only full words that matches oldValue and not when oldValue
is a substring of a larger word.
>
How can it be done?
>
Thanks,
Avi
>

[=?ISO-8859-1?Q?G=F6ran_Andersson?=]

Re: Replace only full words that matches oldValue and not when oldValueis a substring of a larger word

ThatsIT.net.au wrote:

Dim myText As String = "once upon a time in a small town"
Dim myNewText As String = String.Empty
Dim oldWord = "small"
Dim newWord = "large"
Dim words() As String = Split(myText, " ")
>
For Each word In words
myNewText += Replace(word, oldWord, newWord) & " "
Next
>
Response.Write( myNewText)

That doesn't make it any better.

Given this replacement:

Dim oldWord = "all"
Dim newWord = "none"

you would get the string "once upon a time in a smnone town "

Also notice the extra space added at the end...

"Avi" <rememberoti@ya hoo.comwrote in message
news:%23R15$Wvz IHA.4004@TK2MSF TNGP03.phx.gbl. ..

>Hi all,
>>
>I'm using string Replace(string oldValue, string newValue) and would
>like it to replace only full words that matches oldValue and not when
>oldValue is a substring of a larger word.
>>
>How can it be done?
>>
>Thanks,
>Avi
>>

>

--
Göran Andersson
_____

http://www.guffa.com

[=?ISO-8859-1?Q?G=F6ran_Andersson?=]

Re: Replace only full words that matches oldValue and not when oldValueis a substring of a larger word

Avi wrote:

Hi all,
>
I'm using string Replace(string oldValue, string newValue) and would like it
to replace only full words that matches oldValue and not when oldValue is a
substring of a larger word.
>
How can it be done?
>
Thanks,
Avi
>

As Martin suggested, the /b code in a regular expressions is the solution.

Put the word to look for in a regular expression by using the Escape method:

string pattern = "/b" + Regex.Escape(ol dValue) + "/b";

Now you can use that to match the words:

text = Regex.Replace(t ext, pattern, newValue);

--
Göran Andersson
_____

http://www.guffa.com

[Duggi]

Re: Replace only full words that matches oldValue and not whenoldValue is a substring of a larger word

On Jun 15, 8:11 pm, Göran Andersson <gu...@guffa.co mwrote:

Avi wrote:

Hi all,

>

I'm using string Replace(string oldValue, string newValue) and would like it
to replace only full words that matches oldValue and not when oldValue is a
substring of a larger word.

>

How can it be done?

>

Thanks,
Avi

>
As Martin suggested, the /b code in a regular expressions is the solution.
>
Put the word to look for in a regular expression by using the Escape method:
>
string pattern = "/b" + Regex.Escape(ol dValue) + "/b";
>
Now you can use that to match the words:
>
text = Regex.Replace(t ext, pattern, newValue);
>
--
Göran Andersson
_____http://www.guffa.com

Thanks for the help.

string example = "foo foobar barfoo foo";
string result = Regex.Replace(e xample, @"\bfoo\b", "baz");
Console.WriteLi ne(result);
Works out nicely.


-Cnu

[=?ISO-8859-1?Q?G=F6ran_Andersson?=]

Re: Replace only full words that matches oldValue and not whenoldValue is a substring of a larger word

Duggi wrote:

On Jun 15, 8:11 pm, Göran Andersson <gu...@guffa.co mwrote:

>Avi wrote:

>>Hi all,
>>I'm using string Replace(string oldValue, string newValue) and would like it
>>to replace only full words that matches oldValue and not when oldValue is a
>>substring of a larger word.
>>How can it be done?
>>Thanks,
>>Avi

>As Martin suggested, the /b code in a regular expressions is the solution.
>>
>Put the word to look for in a regular expression by using the Escape method:
>>
>string pattern = "/b" + Regex.Escape(ol dValue) + "/b";
>>
>Now you can use that to match the words:
>>
>text = Regex.Replace(t ext, pattern, newValue);
>>
>--
>Göran Andersson
>_____http://www.guffa.com

>
>
>
Thanks for the help.
>
string example = "foo foobar barfoo foo";
string result = Regex.Replace(e xample, @"\bfoo\b", "baz");
Console.WriteLi ne(result);
Works out nicely.
>
>
-Cnu

Yes, that works if you have full control over the input, so that you can
be sure that it doesn't contain any characters that have a special
meaning in a regular expression.

--
Göran Andersson
_____

http://www.guffa.com

[Avi]

Re: Replace only full words that matches oldValue and not when oldValue is a substring of a larger word

Thank you all for your help!

Avi


"Avi" <rememberoti@ya hoo.comwrote in message
news:%23R15$Wvz IHA.4004@TK2MSF TNGP03.phx.gbl. ..

Hi all,
>
I'm using string Replace(string oldValue, string newValue) and would like
it to replace only full words that matches oldValue and not when oldValue
is a substring of a larger word.
>
How can it be done?
>
Thanks,
Avi
>

[ThatsIT.net.au]

Re: Replace only full words that matches oldValue and not when oldValue is a substring of a larger word

Yes your right, didn't think it though, A regex is the way to go.


"Göran Andersson" <guffa@guffa.co mwrote in message
news:%23RJwJmvz IHA.2208@TK2MSF TNGP04.phx.gbl. ..

ThatsIT.net.au wrote:

> Dim myText As String = "once upon a time in a small town"
> Dim myNewText As String = String.Empty
> Dim oldWord = "small"
> Dim newWord = "large"
> Dim words() As String = Split(myText, " ")
>>
> For Each word In words
> myNewText += Replace(word, oldWord, newWord) & " "
> Next
>>
> Response.Write( myNewText)

>
That doesn't make it any better.
>
Given this replacement:
>
Dim oldWord = "all"
Dim newWord = "none"
>
you would get the string "once upon a time in a smnone town "
>
Also notice the extra space added at the end...
>

>"Avi" <rememberoti@ya hoo.comwrote in message
>news:%23R15$Wv zIHA.4004@TK2MS FTNGP03.phx.gbl ...

>>Hi all,
>>>
>>I'm using string Replace(string oldValue, string newValue) and would
>>like it to replace only full words that matches oldValue and not when
>>oldValue is a substring of a larger word.
>>>
>>How can it be done?
>>>
>>Thanks,
>>Avi
>>>

>>

>
>
--
Göran Andersson
_____
http://www.guffa.com