laprep20170502.js

// Data type
// Examples: String, number, boolean

// Data structure
// Examples: arrays, objects


var firstName = "Ram";
var age = "30";

// console.log(age + " + " + age);



// // "30 + 30"


/*
// first step in compilation of console.log(age + " + " + age);

// console.log("30" + " + " + age);


// second step in compilation of console.log(age + " + " + age);

console.log("30 + " + age);

// third step in compilation of console.log(age + " + " + age);

console.log("30 + " + "30");

// fourth step in compilation of console.log(age + " + " + age);

console.log("30 + 30");
*/

// ARRAYS -- a container of elements (aka values, aka items)

var firstNames = ['Ram', 'George', 'Irwing', 'Swami', 'Andrew'];

// console.log(firstNames.length);
// console.log(firstNames[0]);
// console.log(firstNames[4]);

// console.log(firstNames[firstNames.length - 1]);

firstNames[1] = "Mickey Mouse";

firstNames[5] = "Goofy";
firstNames.push("Donald");

// console.log(firstNames);

// I want another array which is the first half of the firstNames array

var firstHalfNames = firstNames.slice(0, firstNames.length / 2 );
// console.log(firstHalfNames);


// OBJECTS -- container of key/value pairs (aka properties)

var personInfo = {firstName: 'Swami', 'lastName': 'Varadan', 'age': 39, 'favorite food': 'pizza'};

var surpriseKey = 'lastName';

// console.log(personInfo['firstName']); // we want 'Swami' to output
// console.log(personInfo.firstName);
// console.log(personInfo['favorite food']);




// RPS
// Write some code that that randomly selects either Rock, Paper, or Scissors from an array

// create an array with the options

var rps = ['Rock', 'Paper', 'Scissors'];

// generate a random number between 0 and 2

var random = Math.floor(Math.random() * (max - min)) + min;

// 

var max = 3;
var min = 0;
var random = Math.floor(Math.random() * (max - min)) + min;

console.log(random);

// one more step here


// RPS 2
// Write some code that that randomly selects either Rock, Paper, or Scissors from an object

var rps2 = {1: 'Rock', 2: 'Paper', 3: 'Scissors'}

// more code down here





/*

List of array methods to be familiar with
* push
* pop
* slice
* shift

List of useful built-in Math functions
* Math.ceil();
* Math.round();
* Math.floor();

Important things to know
* There are two ways to access key/value pairs inside an object. 
  * Way 1: [] USE THIS IF YOU'RE USING A VARIABLE
  * Way 2: . (dot notation) USE THIS IF YOU'RE REFERENCING AN EXPLICIT KEY

*/