Crystal McNeil utsukushiihime

Command Line Crash Course

What is the worst-case time complexity for the following algorithms?

function wordOccurrence(word, phrase){
  let result = 0
  const array  = phrase.split(' ')

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

	app.use(function (req, res) {
	// any get will send 404
	if (req.method === "GET") return res.status(404).send("404 Page Not Found");
	// any other method will say not allowed
	return res.status(405).send("Method not allowed");
	});

	<body>
	<h1>Here are all the fruits!</h1>
	<a href="/fruits/new">add fruit (+)</a>
	<% fruits.forEach((fruit, index) => { %>
	<li>
	<a href="/fruits/<%= index %>"> <%= fruit.name %> </a>
	</li>
	<% }); %>
	</body>

	var mongoose = require('./index')
	, TempSchema = new mongoose.Schema({
	salutation: {type: String, enum: ['Mr.', 'Mrs.', 'Ms.']}
	});

	var Temp = mongoose.model('Temp', TempSchema);

	console.log(Temp.schema.path('salutation').enumValues);
	var temp = new Temp();
	console.log(temp.schema.path('salutation').enumValues);

	# A Django project's configuration lives in settings.py.

	DATABASES = {
	'default': {
	'ENGINE': 'django.db.backends.postgresql',
	'NAME': 'dbname',
	}
	}

	# All AWS C9 envments
	https://eu-central-1.console.aws.amazon.com/cloud9/home?region=us-east-1

	# Instance management
	https://console.aws.amazon.com/ec2/home?region=eu-central-1#Instances:sort=instanceId

	# Create AWS C9 environment
	https://eu-central-1.console.aws.amazon.com/cloud9/home/create

	Setting - set tabs to 2

	function SnakeCase(str) {
	const regex = /\W+/g;

	for (char in str) {
	let newStr = str.toLowerCase().replace(regex, "_");
	return newStr;
	}
	}

	console.log(SnakeCase("This*is a Great-Night"));

	const powerOfTwo = (num) => {
	let pot = Math.pow(2, Math.ceil(Math.log2(num))) - num;

	if (pot === 0) {
	return "true";
	} else {
	return "false";
	}
	};