pratik0809 / LS-Data-Structures

Data Structures I

Topics:

• Big-O Notation (Complexity analysis)
• Stacks
• Queues
• Linked Lists
• Hash Tables

Stacks

• Should have the methods: add, remove, and a getter for the property size
• add should accept a value and place it on top of the stack.
• remove should remove and return the top value off of the stack.
• size should return how many items are on the stack.

Queues

• Should have the methods: enqueue, dequeue, and a getter for the property size
• enqueue should add an item to the back of the queue.
• dequeue should remove an item from the front of the queue.
• size should return the number of items in the queue.

Linked Lists

• Should have the methods: addToTail, removeHead, and contains.
• addToTail replaces the tail with a new value that is passed in.
• removeHead removes and returns the head node.
• contains should searth through the linked list and return true if a matching value is found.
• The head property is a reference to the first node and the tail property is a reference to the last node. These are the only two properties that you need to keep track of an infinite number of nodes. Build your nodes with objects.

Hash Tables

• Should have the methods: insert, remove, and retrieve.
• insert should take a key value pair and add the value to the hash table.
• retrieve should return the value associated with a key.
• remove should removed the given key's value from the hash table.
• Should properly handle collisions. If two keys map to the same index in the storage table then you should store a 2d array as the value. Make each key/value pair its own array that is nested inside of the array stored at that index on the table.

Extra Credit

• Uncomment the final test in hash-table.test.js and make the hash-table rebalance. As a hash table increases in size the associated storage table will typically double in size once it reaches a certain capacity. Change the hash table so that it doubles the size of the storage table once it is 75% full.
• Make the linked-list a doubly linked list.