ASCII has 33 control characters. Many of them are defunct or are used for purposes for which they were not originally intended. Most of them are unprintable and some can cause problems if not filtered out of input. All the same, a handful of these characters have proven to be indispensible when it comes to performing certain tasks in Batch.
In this post, I’ll show you commonly-used techniques for generating specific control characters, as well as two lesser-known methods for storing almost any control character in a variable. But finding uses for them is an entirely different matter. One which will be covered in an upcoming post.
This is a follow-up to my recent post on how to store the nth line of a text file in a variable. The solution given won’t work for extremely long lines because the line requested by the user is stored in a variable and variables in Batch can only hold up to 8191 characters.
If you need to select an extremely long line from a file and save it to a new file, there is a workaround. But it ain’t pretty, or efficient. It involves
findstr, and a whole lot of temporary files. 😈