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Can you use variables in substring?

Substring extraction can be used to ‘extract’ a range of characters from an image variable so they can be used like normal variables in other fields throughout Photo Mechanic.

What is returned by substr?

The SUBSTR function returns a portion of string, beginning at a specified character position, and a specified number of characters long. To retrieve a portion of string based on bytes, use SUBSTRB. Return Value. The return value is the same data type as string.

Which function is used to extract a substring?

SUBSTR function
The SUBSTR function returns a substring of a character value. You specify the start position of the substring within the value. You can also specify the length of the substring (if omitted, the substring extends from the start position to the end of the string value).

How do I trim a variable in a batch file?

To express a variable in a batch file you start and end the variable with % signs. To trim a variable, you add :~p,n to the end of the name part of the variable.

Is there substring syntax for CMD environment variables?

This variable substring syntax only works for CMD environment variables, like %MYVAR%, it will not work with FOR parameter variables, like %%G, however a simple workaround is to set a variable first: Set %MYVAR%=%%G and then find the substring of the new variable.

How to get substrings of argument variables in Excel?

NOTE: The index of the strings is zero based, so the first character is at position 0, the second at 1, etc. To get substrings of argument variables such as %0, %1, etc. you have to assign them to a normal environment variable using set first:

How to search a file for a substring?

The solutions that search a file for a substring can also search a string, eg. find or findstr. In your case, the easy solution would be to pipe a string into the command instead of supplying a filename eg. Built on @user839791 ‘s answer, but I’ve added a few more things.

How does% ~ 0 expand in a batch file?

%~0 expands to the name of the own batch, exactly as it was typed. In a function %~0 expands always to the name of the function, not of the batch file. But if you use at least one modifier it will show the filename again!