Windows batch script parse string

Collectives on Stack Overflow. Learn more. Parsing string in batch file Ask Question. Asked 9 years, 3 months ago. Active 3 years, 2 months ago. Viewed 46k times. Add a comment. Active Oldest Votes. Shawley D. Shawley It may sound silly until you spend hours trying to track down an obtuse error message generated by a script.

Trust me, you want command processor extensions. I use this variable to make fully qualified filepaths to any other files in the same directory as our script. Variable Declaration DOS does not require declaration of variables.

Listing Existing Variables The SET command with no arguments will list all variables for the current command prompt session. Variable Scope Global vs Local By default, variables are global to your entire command prompt session. Special Variables There are a few special situations where variables work a bit differently.

Command Line Arguments to Your Script You can read the command line arguments passed to your script using a special syntax. However, when I've about more than In processing very large files, your biggest performance hit is likely coming from having to spawn a new process every time you call findstr.

You don't notice that most of the time, but you're doing this a couple million times in a log file of the size you mentioned, and it adds up. For your purposes, you might see better performance by doing some rudimentary string parsing within cmd. You lose out on a lot of findstr's powerful features, but you weren't using them anyway.

True, but I don't think there's a way to do anything better from a batch file. You can get both the single-process performance boost and full regex support in PowerShell or VBScript, though. I might add that a script may not be the right tool in any case. Thank you for your response and help, especially to AverageJoeOfToronto who has been helping out. Understood there is a limitation of what findstr can perform, hence will stick to the given script.

Office Office Exchange Server. Not an IT pro? Script Center. Sign in. United States English. Ask a question. Quick access. Search related threads. The question is not asking about Powershell or Perl — Zimba. Powershell requires much more resources RAM than cmd so if all you need is something quick and simple, it makes more sense to use cmd.

CMD uses native Win32 calls and Powershell uses the. Net framework. It grew to 2. Alex D. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually.