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JavaScript Design Patterns

Design patterns are utilized to structure code in an optimized manner to help solve commonly occuring software problems.

• Constructor Pattern
• Prototype Pattern
• Command Pattern
• Singleton Pattern
• Module Pattern
• Factory Pattern

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Data Structures and Algorithms

• Recursion
• Big O Notaion
• Arrays
• Linked Lists
• Stacks & Queues
• Hash Maps
• Binary Search Trees
• Search Algorithms

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Postgres Command Line

• postgres=# -> indicates that we are in the psql shell
• $ -> indicates that we are in the bash shell

Bash terminal

• $ psql -> connect to server to enter postgres=# prompt
• $ createuser -Pw --interactive -> Interactive user creation, follow prompts to create name, password, attributes
• $ createdb -U <user_name> <databse_name> -> Creates a database and assigns owner with -U flag, user must exist
• $ dropuser <name> -> removes user from server
• $ dropdb -> removes database from server

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function average(numbers) {
  let total = 0;
	for (let i = 0; i < numbers.length; i++) {
		total += numbers[i]
	}
	return total/numbers.length;
}

/* From here down, you are not expected to 
   understand.... for now :)  

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function accessFirstItem(array) {
  return array[0];
}

function accessThirdItem(array) {
  return array[2];
}

/* From here down, you are not expected to 
   understand.... for now :)  

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function main() {
	try {
  	doAllTheThings();
	}
	catch(e) {
		console.error(e);
		reportError(e);
	}
}

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function isDivisible(divisee, divisor) {
  if (divisee % divisor === 0) return true;
	else return false; 
}

/* From here down, you are not expected to 
   understand.... for now :)  
   
   
   Nothing to see here!

Thorn51

function textNormalizer(text) {
	return `${text.toLowerCase().slice(3,48)}`;
}

/* From here down, you are not expected to 
   understand.... for now :)  
   
   
   Nothing to see here!