celebrate.ts

/// <reference path="node.d.ts" />
"use strict";

const HEARTS: Array<string> =
    ["❤","♥","💗","💓","💕","💖","💞","💘","💛","💙","💜","💚","💝",];

const BIRTHDAY: Array<string> = ["🙌","🎂","🍰","🎈","🎉","🎁","🍕"];

const EMOJI = BIRTHDAY;

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

function *emojiGenerator(): Iterator<string> {
    while (true) {
        yield randomItem(EMOJI);
    }
}

function take<T>(generator: Iterator<T>, count: number): GeneratorFunction {
    return function* () {
        while (count--) { yield generator.next(); }
    };
}

(function main(): void {
    const numberOfElements: number = parseInt(process.argv[2]) || 140;
    const printEmoji = take(emojiGenerator(), numberOfElements);

    for (let emoji of printEmoji()) {
        process.stdout.write(emoji.value);
    }
})();