teopaolucci / js-objects-stack-warmup

JavaScript Warm-Up: Stack

In computer science, a stack or LIFO (last in, first out) is an abstract data type that serves as a collection of elements, with two principal operations: push, which adds an element to the collection, and pop, which removes the last element that was added. -- Stack (abstract data type), Wikipedia

Instructions

1. Fork and clone this repository.
2. Change into the new directory.
3. Follow the remaining instructions.

Create a custom JavaScript object modeling the stack using a constructor function and a prototype. Starter code has been provided for you in lib/stack.js.

Requirements

• You should be able to create a new stack with var stack = Stack.new();.
• Your stack should have two methods, push and pop.
  • push adds a new value to the stack's storage and returns the added value
  • pop removes the most recently added value from the stack's storage and returns it
• You should not use Array.prototype.push() or Array.prototype.pop()

Bonus

Pre-fill the stack on instantiation.

var stack = Stack.new([1,2,3])
stack.pop() //=> 3

Which parts of each method are side-effects, and which are the "main" effect?

License

Source code distributed under the MIT license. Text and other assets copyright General Assembly, Inc., all rights reserved.