I am trying to write a regular expression that will match a link-attribute in .png files.

Example: I have a lot of .png like this


I want to search for /s144 /s1300 /s50 and so on and replace it with /s400+c. My Regex /\/s\B\d{2,4}/ works fine in Regex-Tester.

Now I want to do the job with vim, but I always get 'pattern not found'. What is wrong with my regular-expression?

1 Answer 1


There's a few problems with your version. / needs to be backslash escaped in the Vim find command line*, and {2,4} type repeats also need a preceding backslash. The \B zero-width non-word boundary atom does not exist in Vim-flavour regular expressions, but I don't think it's actually required for your purpose, anyway.

Try /\/s\d\{2,4}/

See :help pattern-overview for details of Vim's regular expressions.

* Note that in other contexts, such as in an :s command, you can use almost any non-alphanumeric character as a regular expression delimiter. If you want to include / characters in your expression, just use a different character for your delimiter.

  • /\/s\d{2,4}/is not working for me, but /\/s\d\{2,4}/ works fine! Thanks for help.
    – oliver
    Feb 21, 2015 at 12:14
  • You're right! I've updated my answer.
    – Rich
    Feb 21, 2015 at 16:46

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