Principle Three: Don't Repeat Yourself

This is a fundamental principle of modern web development. Don't be lazy. Write your own code.

• Principle Three Point Two: Use Libraries Wisely
• Move on to Principle Four: Don't Repeat Yourself (Again)

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Example Time!

Here's an example of how to apply this principle:

				function makePizza() {
					var sauce = "marinara";
					var cheese = "mozzarella";
					var toppings = ["pepperoni", "mushrooms", "olives"];
					return [sauce, cheese, toppings];
				}
			

See, this function doesn't repeat itself at all!