Yasa Akbulut yasakbulut

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

	var user = {
	validateCredentials: function (username, password) {
	return (
	(!(username += '') \|\| username === '') ? { error: "No Username Given.", field: 'name' }
	: (!(username += '') \|\| password === '') ? { error: "No Password Given.", field: 'pass' }
	: (username.length < 3) ? { error: "Username is less than 3 Characters.", field: 'name' }
	: (password.length < 4) ? { error: "Password is less than 4 Characters.", field: 'pass' }
	: (!/^([a-z0-9_-]+)$/i.test(username)) ? { error: "Username contains invalid characters.", field: 'name' }
	: false
	);