hearts.js

// pre-compiled
function randomElement(array) {
    var index = Math.random() * array.length | 0;
    return array[index];
}
function printEmoji(emoji, num) {
    if (num <= 0)
        return;
    process.stdout.write(randomElement(emoji));
    return printEmoji(emoji, --num);
}
(function main() {
    var emoji = ["❤", "💔", "♥", "💗", "💓", "💕", "💖", "💞", "💘", "💛", "💙", "💜", "💚", "💝",];
    var numberOfElements = 140;
    printEmoji(emoji, numberOfElements);
})();

hearts.ts

/// <reference path="node.d.ts" />

function randomElement(array: Array<string>): string {
    const index = Math.random() * array.length | 0;
    return array[index];
}

function printEmoji(emoji: Array<string>, num: number) {
    if (num <= 0) return;
    process.stdout.write(randomElement(emoji));
    return printEmoji(emoji, --num);
}

(function main() {
    const emoji: Array<string> =
        ["❤","♥","💗","💓","💕","💖","💞","💘","💛","💙","💜","💚","💝",];
    let numberOfElements: number = 140;
    printEmoji(emoji, numberOfElements);
})();

usage.md

On OS X,

$ node celebrate.js | pbcopy