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How do I use regular expressions in Rstudio's "Find in files"?
Searching for literal numbers work just fine:
But when trying to use a regular expression to find a number I can't:
The documentation does not mention which type of regex is needed: https://support.rstudio.com/hc/en-us/articles/200710523-Navigating-Code
So maybe I am using a wrong flavor of regex?
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Most people are familiar with command-f for searching through files; shift-command-f launches a window to search through files. You can also customize the search type for certain extensions, or to exclude stuff like . html or . md which hides duplicate results if you work with a lot of knitr.
Basically (0+1)* mathes any sequence of ones and zeroes. So, in your example (0+1)*1(0+1)* should match any sequence that has 1. It would not match 000 , but it would match 010 , 1 , 111 etc. (0+1) means 0 OR 1. 1* means any number of ones.
A regular expression (regex or regexp for short) is a special text string for describing a search pattern. You can think of regular expressions as wildcards on steroids. You are probably familiar with wildcard notations such as *. txt to find all text files in a file manager.
RStudio uses POSIX Basic Regular Expressions for its "Find in files" functionality (because it is using grep under the hood).
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