design-patterns

Using JavaScript's prototype inheritance nature to apply sorting algorithms, object oriented programming concepts, and design patterns

To Run

node sort-numbers.js

Goal

Demonstrate how a few different design patterns can be used with JavaScript.

Design patterns used so far:

• Factory Method
• Command Pattern
• Strategy Pattern

Sorting Algorithms:

• Merge Sort
• Insertion Sort
• Quick Sort with a random pivot

Performance

You can read about how I improved my Merge Sort performance here: http://douglasmak.com/dont-get-fancy-with-javascript/

• Merge Sort (10,000,000 random numbers): 16362 ms
• Insertion Sort (1,000,000 random numbers): 1535195 ms
• Quick Sort with a random pivot (10,000,000 random numbers): 9958 ms

Things to do

• Implement FlyWeight pattern for the number generator
• Implement the Async library to run commands in parallel
• Implement sorting visualizations
• Implement other numbers orders (reverse, sorted, a few unique, etc...)