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Learning TypeScript 2.x - Second Edition
book

Learning TypeScript 2.x - Second Edition

by Remo H. Jansen
April 2018
Beginner content levelBeginner
536 pages
13h 21m
English
Packt Publishing
Content preview from Learning TypeScript 2.x - Second Edition

Working with the filesystem

We are going to implement a very small Node.js application. This application can be used as a search and replace tool. The result can be used as a command-line application and can be executed using the following command:

ts-node app.ts --files ./**/*.txt --find SOMETHING --replace SOMETHING_ELSE 

The application will replace one word for another in all the matching files. We are going to use the core filesystem API (fs) and two external npm modules:

  • glob is used to find files that match a given pattern
  • yargs is used to parse command-line arguments

We need to install both packages and the corresponding type definition files:

npm install glob yargs --save 

npm install @types/glob @types/yargs @types/node -save-dev ...
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Publisher Resources

ISBN: 9781788391474Supplemental Content