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JavaScript ES2015 solutions to Cracking the Coding Interview

These are solutions and associated unit tests for the questions in Cracking the Coding Interview 6th edition using JavaScript ES2015 features. These solutions specifically take advantage of ES2015 enhancements to the JavaScript language and require the latest Node.js (>= v5.0.0) to work properly. As not all ES2015 features are available in V8 yet babel is being used to fill in the gaps (at this point only the ES2015 module syntax is being transpiled by babel).

Setup the project

Once downloaded ensure that Node.js is installed and run the following commands in this directory:

npm install

Running unit tests

The solutions are demonstrated by a set of unit tests which use the Mocha unit test framework and Chai as an assertions library. These tests can be executed at any time with:

npm test

As part of the unit tests ESLint will also be run against all files to ensure that the JavaScript is valid and follows best practice.

Linting source code

While executing ESLint by itself is not necessary (as it runs as part of the unit test execution) you can choose to run it with:

npm run lint

Dependencies

This implementation of the solutions requires the following dependencies:

  • Node.js >= v5.0.0
  • npm >= v3
  • Mocha (installed via npm)
  • Chai (installed via npm)
  • Babel (installed via npm)