Utils Project

Every project of any size grows a utils module that contains random helpers. Many of these outgrow their origins and become a shared general-purpose library, such as Lodash in JS or ActiveSupport in Ruby.

Objective

Create your own mini utils file and implement the following functions from lodash:

Array

• intersection
• difference
• uniq

Map

• mapValues: their impl uses plain objects. I suggest you use the JS Map

String

• template - similar to the built-in backtick strings of ES6

In addition, choose three more functions from the (long) list in the lodash docs.

Additional Requirements

• Each function should have a set of Jasmine unit tests to demonstrate it’s correct
• Don’t forget about edgecases like someone passing in undefined or empty input

Bonus

• Measure your testing coverage with an open source tool so you can see if you missed any test coverage
• Publish it as a real NPM package, with a unique package name such as yourname-utils and nice README so it looks nice on NPM