https://lockblock-dev.github.io/tags/javascript/Recent content in JavaScript on LockBlock-dev blogHugoen-usWed, 15 Jul 2026 00:00:00 +0000https://lockblock-dev.github.io/posts/breaking-math-random-to-win/Mon, 03 Mar 2025 00:00:00 +0000https://lockblock-dev.github.io/posts/breaking-math-random-to-win/<p>I was talking with <a href="https://github.com/MasterIO02">MasterIO</a> about Yuna, the Discord bot of <a href="https://ordr.issou.best/">o!rdr</a>, when I said that I could win big money.</p> <p>Big money in this story means virtual currency from a Discord bot. Sadly I did not buy a house with JavaScript.</p> <p>He told me to &ldquo;win against <code>Math.random</code>&rdquo;.</p> <p>So I did what any reasonable person would do. I googled how to break <code>Math.random</code>.</p> <h2 id="javascript-moment">JavaScript moment</h2> <p><code>Math.random()</code> is not magic. It does not call the universe and ask it politely for a number. It is pseudo-random, which means that it uses an internal state to generate numbers that look random enough for most things.</p>