random from array.js

var roasts = [
    "I'm not saying I hate you, but I would unplug your life support to charge my phone.",
    "Is your ass jealous of the amount of shit that just came out of your mouth?",
    "Yo're so ugly, when your mom dropped you off at school she got a fine for littering.",
    "Roses are red, violets are blue, I have 5 fingers, the 3rd ones for you.",
    "I wasn't born with enough middle fingers to let you know how I feel about you.",
    "Your birth certificate is an apology letter from the condom factory.",
    "I bet your brain feels as good as new, seeing that you never use it.",
    "You bring everyone a lot of joy, when you leave the room.",
    "You're the reason they invented double doors!",
    "You must have been born on a highway because that's where most accidents happen.",
    "If you are going to be two faced, at least make one of them pretty.",
    "If laughter is the best medicine, your face must be curing the world.",
    "What's the difference between you and eggs? Eggs get laid and you don't.",
    "You're so ugly you scare the shit back into people.",
    "I'm jealous of all the people that haven't met you!",
    "I'd like to see things from your point of view but I can't seem to get my head that far up my ass.",
    "I could eat a bowl of alphabet soup and shit out a smarter statement than that.",
    "There's only one problem with your face, I can see it.",
    "Two wrongs don't make a right, take your parents as an example.",
    "If I wanted to kill myself I'd climb your ego and jump to your IQ.",
    "You're so ugly, when you popped out the doctor said \"Aww what a treasure\" and your mom said \"Yeah, lets bury it.\"",
    "Your family tree must be a cactus because everybody on it is a prick.",
    "You shouldn't play hide and seek, no one would look for you.",
    "It's better to let someone think you are an Idiot than to open your mouth and prove it.",
    "If you're gonna be a smartass, first you have to be smart. Otherwise you're just an ass.",
    "At least when I do a handstand my stomach doesn't hit me in the face.",
    "If you really want to know about mistakes, you should ask your parents.",
    "Somewhere out there is a tree, tirelessly producing oxygen so you can breathe. I think you owe it an apology.",
    "I don't exactly hate you, but if you were on fire and I had water, I'd drink it.",
    "Hey, you have somthing on your chin... no, the 3rd one down",
];

function shuffle(array, num) {
    var copy = [], n = array.length, i;
  
    // Select random elements from the remainder of the array
	// num specifies how many elements we need at the moment.
    for (let i = 0; i < num; i++) {
        // Pick a remaining element…
        index = Math.floor(Math.random() * n--);

        // And move it to the new array.
        copy.push(array.splice(index, 1)[0]);
    }
  	
	// Return the random items
    return copy;
}

// First get 5 random items, roasts array gets modified everytime and loses the members that have been randomized.
var firstRoasts = shuffle(roasts, 5);
firstRoasts = firstRoasts.concat(shuffle(roasts, 5));
firstRoasts = firstRoasts.concat(shuffle(roasts, 10));

console.log(firstRoasts);
console.log(roasts);