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Search and replace on the command line using Javscript regular expressions.
A handy replacement to
$ npm install -g xp
Usage: xp [-ialo] <search pattern> [replace pattern] [--] [files...] Options: -h, --help output usage information -V, --version output the version number -i, --insensitive perform case-insensitive searching -a, --all perform search (and replace) on whole input -l, --lines show the filename and line number for matches -O, --only-matching-lines show only the lines that match -o, --only-matching show only the portion of the search text that matched <search_pattern> the search pattern [replace_pattern] the replacement pattern [files...] one or more files to read Remarks: The search pattern defaults to line-by-line matching by default. Specifying `-a' will cause the input to be matched in whole (inverse of the /.../m flag), though will cause the entire input to be buffered in memory prior to performing a match. If no replacement pattern is provided, and filenames are to be specified, `--' must come after the search pattern and before the command line arguments. It is innocuous to have it when using both a replacement pattern and a list of files. If no files are specified, or if a single hyphen (`-') is specified as a file, then standard input is read instead. The `--lines' flag only applies when `-a' is not specified and no replacement is being performed. The `--only-matching` flag only applies when no replacement is being performed. Bugs: For bug reports, updates, issues or feedback, please file an issue on GitHub: https://github.com/qix-/xp
$ echo 'hello' | xp -o .hello
$ echo 'hello' | xp h jjello
$ cat /usr/share/dict/propernames | xp -O 'Jean\-([A-Z][a-z]*)' 'Jean clan: $1'Jean clan: ChristopheJean clan: Pierre