Objects

Unordered, key value pairs!

let instructor = {
	firstName:"Kelly",
	isInstructor:true,
	favouriteNumbers:[1,2,3,4]
}

When to use Objects

• when you don’t need order
• When you need fast access / insertion and removal

Big O if Objects

Insertion - O(1)

Removal - O(1)

Searching - O(N)

Access - O(1)

• When you don’t need any ordering, objects are an excellent choice!

Big O if Objects Methods

Object.keys - O(N)

Object.values - O(N)

Object,entries - O(N)

hasOwnProperty -O(1)

Arrays

• Ordered lists!