How to bring a special string into a variable?

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Furplado
Posts: 12
Joined: 13 Feb 2021 10:18

How to bring a special string into a variable?

#1 Post by Furplado » 18 Feb 2021 11:19

I have all done in a cmd-window:

I want to have a variable with the following content:

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%BUFFER:*Word=%

This is what I have tried out:

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C:\Users\D>set "a=%BUFFER:*Word=%"
This is now the content of the variable a

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C:\Users\D>echo "%a%"
".Document.12"

C:\Users\D>
My expectation was, that the content would be

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%BUFFER:*Word=%
Question:
How can I bring "%BUFFER:*Word=%" into variable a?


Thank you.

Squashman
Expert
Posts: 4237
Joined: 23 Dec 2011 13:59

Re: How to bring a special string into a variable?

#2 Post by Squashman » 18 Feb 2021 13:24

If you want literal % symbols to be assigned to a variable in a batch file then you need to double them.

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set "a=%%BUFFER:*Word=%%"
At the command prompt just use the normal ^ to escape the %.

Furplado
Posts: 12
Joined: 13 Feb 2021 10:18

Re: How to bring a special string into a variable?

#3 Post by Furplado » 18 Feb 2021 14:10

Thank you.

Very strange.
I have exactly repeated what I have done in post 1. And now the behaviour is different (without using "^" ):

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C:\Users\D>set "a=%BUFFER:*Word=%"

C:\Users\D>echo "%a%"
"%BUFFER:*Word=%"

C:\Users\D>

Squashman
Expert
Posts: 4237
Joined: 23 Dec 2011 13:59

Re: How to bring a special string into a variable?

#4 Post by Squashman » 18 Feb 2021 14:28

Furplado wrote:
18 Feb 2021 14:10
Thank you.

Very strange.
I have exactly repeated what I have done in post 1. And now the behaviour is different (without using "^" ):

Code: Select all

C:\Users\D>set "a=%BUFFER:*Word=%"

C:\Users\D>echo "%a%"
"%BUFFER:*Word=%"

C:\Users\D>
If you previously defined the variable BUFFER in the existing environment it will expand the variable. If it is not defined then it will just assign the literal string to the variable.

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H:\>set "buffer="

H:\>set "a=%BUFFER:*Word=%"

H:\>echo %a%
%BUFFER:*Word=%

H:\>set "buffer=word.document"

H:\>set a=%^BUFFER:*Word=%

H:\>echo %a%
%BUFFER:*Word=%

H:\>set a=%BUFFER:*Word=%

H:\>echo %a%
.document

Furplado
Posts: 12
Joined: 13 Feb 2021 10:18

Re: How to bring a special string into a variable?

#5 Post by Furplado » 18 Feb 2021 14:53

OK. I see "^" must be before a variable.

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