JavaScript

Operators & Flow Control

Numbers

JS has a single Number type

// Arithmetic
1 + 1; // = 2
8 - 7; // = 1
10 * 3; // = 30
40 / 8; // = 5

// Modulo
22 % 2; // = 0
27 % 4; // = 3
9 % 2.5; // = 1.5

// Infinity and non real numbers
Infinity - Infinity;
Number.POSITIVE_INFINITY; // alias for Infinity
Number.NEGATIVE_INFINITY; // alias for -Infinity

Booleans / Comparisons

TODO

Patterns

TODO

Objects

• Built-Ins

Closures

TODO

Prototypal Inheritance

TODO

Factories

const Player = (name, teamSymbol) => {
  let score = 0;
  const getName = () => name;
  const setName = (x) => (name = x);
  const getTeamSymbol = () => teamSymbol;
  const setTeamSymbol = (x) => (teamSymbol = x);
  const getScore = () => score;
  const incrementScore = () => {
    score++;
  };

  const play = (x, y, gameBoard) => {
    console.log(`${name} played at [${x}, ${y}]!`);
  };

  return {
    getName,
    setName,
    getTeamSymbol,
    setTeamSymbol,
    getScore,
    incrementScore,
    play,
  };
};

Module Pattern

Classes

TODO: list of all class features

class User {
  constructor(name) {
    this.name = name;
  }

  sayHi() {
    alert(this.name);
  }
}

let user = new User("John");
user.sayHi();

DOM Manipulation

TODO