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).

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

npm install

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.

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

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)

Solutions for Cracking the Coding Interview 6th Edition by Gayle Laakmann McDowell.

Crowdsourcing solutions for every widely used programming language. Contributions welcome.

Solutions in Java are contained directly in this repo and are the same solutions found in the book. Solutions in other programming languages are contributed by the community and each have their own dedicated repos which are referenced from this repo as git submodules. What this means for cloning:

• If you want to make a local clone of solutions in all languages, you should use the --recursive option:

    git clone --recursive https://github.com/careercup/CtCI-6th-Edition.git
  

• If you're only interested in the Java solutions:

    git clone https://github.com/careercup/CtCI-6th-Edition.git
  

• If you originally cloned without --recursive, and then later decide you want the git submodules too, run:

    git submodule update --init --recursive
  

1. Fork the appropriate repo for your language to your GitHub user. (see Where to submit pull requests)
2. Write quality code and lint if applicable.
3. Add tests if applicable.
4. Open a pull request and provide a descriptive comment for what you did.

Pull requests pertaining to Java solutions should be submitted to the main CtCI-6th-Edition repo. Please submit pull requests for all other languages to the appropriate language-specific repo.

• CtCI-6th-Edition-Clojure
• CtCI-6th-Edition-C
• CtCI-6th-Edition-cpp
• CtCI-6th-Edition-CSharp
• CtCI-6th-Edition-Go
• CtCI-6th-Edition-Groovy
• CtCI-6th-Edition-Haskell
• CtCI-6th-Edition-JavaScript
• CtCI-6th-Edition-JavaScript-ES2015
• CtCI-6th-Edition-Julia
• CtCI-6th-Edition-Kotlin
• CtCI-6th-Edition-Objective-C
• CtCI-6th-Edition-php
• CtCI-6th-Edition-Python
• CtCI-6th-Edition-Ruby
• CtCI-6th-Edition-Swift

Solutions in other languages are welcome too and should follow this workflow:

1. Create the new repo under your own GitHub user account and start contributing solutions. The repo name should follow this naming convention: CtCI-6th-Edition-<language>.
2. Open an issue on the CtCI-6th-Edition repo to request that your solution repo be promoted to join the careercup GitHub organization and referenced from the main repo as a git submodule.
3. If your request is approved, navigate to your repo's settings page and select the "Transfer Ownership" option, and specify "careercup" as the new owner.