https://github.com/bert2/bert2-codecrafters-grep-haskell
My λ for https://app.codecrafters.io/courses/grep
https://github.com/bert2/bert2-codecrafters-grep-haskell
Last synced: 6 months ago
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My λ for https://app.codecrafters.io/courses/grep
- Host: GitHub
- URL: https://github.com/bert2/bert2-codecrafters-grep-haskell
- Owner: bert2
- Created: 2023-02-04T18:14:46.000Z (about 3 years ago)
- Default Branch: master
- Last Pushed: 2023-02-12T12:36:13.000Z (about 3 years ago)
- Last Synced: 2025-09-11T18:00:00.038Z (6 months ago)
- Language: Haskell
- Size: 29.3 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
This is a starting point for Haskell solutions to the
["Build Your Own grep" Challenge](https://app.codecrafters.io/courses/grep/overview).
[Regular expressions](https://en.wikipedia.org/wiki/Regular_expression)
(Regexes, for short) are patterns used to match character combinations in
strings. [`grep`](https://en.wikipedia.org/wiki/Grep) is a CLI tool for
searching using Regexes.
In this challenge you'll build your own implementation of `grep`. Along the way
we'll learn about Regex syntax, how parsers/lexers work, and how regular
expressions are evaluated.
**Note**: If you're viewing this repo on GitHub, head over to
[codecrafters.io](https://codecrafters.io) to try the challenge.
# Passing the first stage
The entry point for your `grep` implementation is in `Main.hs`. Study and
uncomment the relevant code, and push your changes to pass the first stage:
```sh
git add .
git commit -m "pass 1st stage" # any msg
git push origin master
```
Time to move on to the next stage!
# Stage 2 & beyond
Note: This section is for stages 2 and beyond.
1. Ensure you have `stack` installed locally
1. Run `./your_grep.sh` to run your program, which is implemented in `Main.hs`.
1. Commit your changes and run `git push origin master` to submit your solution
to CodeCrafters. Test output will be streamed to your terminal.