9

Challenge 9 - Write your own grep

This challenge corresponds to the ninth part of the Coding Challenges series by John Crickett https://codingchallenges.fyi/challenges/challenge-grep.

Description

The GREP tool is written in grep.ts file and the grep.index.ts is the command line version of the tool. The tool is used to search for a pattern in a file or a directory and print the matching lines.

The implementation is using the inbuilt RegExp class of JavaScript.

Usage

You can use ts-node to run the tool as follows:

npx ts-node grep.index.ts <expression> [-i] [-v] <path>

The following options are supported:

• -i: case insensitive search
• -v: print lines that do not match the pattern

Run tests

To run the tests for the grep tool, go to the root directory of this repository and run the following command:

npm test src/9/

All the tests are made for LINUX environment only. If you want to run the tests in Windows environment, you can use the Git Bash terminal or Windows Subsystem for Linux (WSL).