IT notes : February 2014

Wednesday, February 26, 2014

Wednesday, February 19, 2014

rock paper scissors


var userChoice = prompt("Do you choose rock, paper or scissors?");
if (userChoice!="rock" && userChoice!="paper" && userChoice!="scissors")
{
   userChoice = prompt("please enter a valid choice");
};
var computerChoice = Math.random();
if (computerChoice < 0.34) {
 computerChoice = "rock";
} else if(computerChoice <= 0.67) {
 computerChoice = "paper";
} else {
 computerChoice = "scissors";
}
var compare=function(choice1, choice2)
{
    if (choice1===choice2)
    {
        return"The result is a tie!";
    }
    else if(choice1==="rock")
    {
        if (choice2==="scissors")
        {
            return "rock wins";
        }
        else
        {
            return "paper wins";
        }
    }    
    else if(choice1==="paper")
    {
        if(choice2==="rock")
        {
            return "paper wins";
        }
        else
        {
            return "scissors wins";
        }
    }
    else
    {
        if(choice2==="rock")
        {
            return "rock wins";
        }
        else
        {
            return "scissors wins";
        }
    }
};
console.log(compare(userChoice, computerChoice));

Play Game!

Tuesday, February 18, 2014

function definition

JS creates functions by assigning variables to them, instead of defining new commands like Python

function syntax

var name=function(param){what the function does;};

parameters

stuff in parentheses when function is defined

arguments

stuff in parentheses when function is called

call

to execute the commands in a function

D.R.Y.

don't repeat yourself

return

saves but does not print the result of the function

scope

global or local

global

defined outside a function

local

defined inside a function and only applicable in that particular function

var

used to define the scope of a variable, can be used even on variables of the same name to leave a global variable unchanged

Tuesday, February 11, 2014

Hello World

I made a Hello World js program.

console.log("Hello World");

Saturday, February 8, 2014

shapes notes

graphics in order of first on the bottom
y coordinate reversed
default fill=black if none listed

my svg graphic

Tuesday, February 4, 2014

batman

var age=prompt("What's your age?");
if(age<18)
{
    console.log("you may play but I am not responsible for anything");
}
else
{
    console.log("play on!");
}
console.log("Snow White and Batman were hanging out at the bus stop, waiting to go to the shops. There was a sale on and both needed some new threads. You've never really liked Batman. You walk up to him.");
console.log("Batman glares at you.");
var userAnswer=prompt("Are you feeling lucky.punk?");
if(userAnswer==="yes")
{
    console.log("Batman hits you very hard. It's Batman and you're you! Of course Batman wins!");
}
else
{
    console.log("You did not say yes to feeling lucky. Good choice! You are a winner in the game of not getting beaten up by batman.");
}
var feedback=prompt("rate this game out of ten");
if(feedback>8)
{
    console.log("This is just the begining of my game empire. Stay tuned for more!");
}
else
{
    console.log("I slaved away at this game and you gave me that score?! The nerve! Just you wait!");
}