WebAssembly COBOL Pong

Neat! The actual COBOL is pretty minimal, just tracking where the balls and paddles are and then calling out to update the DOM. It doesn&#x27;t look anywhere near as horrific as I would have expected :)<p><a href="https:&#x2F;&#x2F;github.com&#x2F;moxon6&#x2F;cobol-js-emscripten&#x2F;blob&#x2F;master&#x2F;cob&#x2F;main.cob" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;moxon6&#x2F;cobol-js-emscripten&#x2F;blob&#x2F;master&#x2F;co...</a>

For player 2, &#x27;J&#x27; goes up, while pressing &#x27;L&#x27; goes to the left from the perspective of the paddle. This feels like made in purpose to hurt vi users.

I love how this is a total geekery for fun project and one of the best quasi job application in 2020.

Cute little project. Thumb up for selecting Cobol as the language of choice for the implementation. I might feel nostalgic.

See also, using COBOL with Cloudflare Workers (via WebAssembly): <a href="https:&#x2F;&#x2F;blog.cloudflare.com&#x2F;cloudflare-workers-now-support-cobol&#x2F;" rel="nofollow">https:&#x2F;&#x2F;blog.cloudflare.com&#x2F;cloudflare-workers-now-support-c...</a>

This is sweet! Interestingly it seems to only accept QWERTY input even when the keyboard has an alternate mapping set. This makes sense though given the positions of the keys chosen

The ball doesn&#x27;t seem to bounce &quot;properly&quot; - i.e. upwards if it lands towards the top of the paddle and downwards if it lands towards the bottom of the paddle.

That&#x27;s impressive!<p>How did you remove all the bloat generated after Emscripten&#x27;s compilation?<p>I&#x27;ve coded a snake game in C and when I compiled, the app.js file itself was ~2mb.

I heard COBOL skills are in demand these days in the US.

When I view the source code, it&#x27;s just a javascript file,<p><a href="https:&#x2F;&#x2F;moxon6.github.io&#x2F;cobol-js-emscripten&#x2F;cobol-js&#x2F;index.js" rel="nofollow">https:&#x2F;&#x2F;moxon6.github.io&#x2F;cobol-js-emscripten&#x2F;cobol-js&#x2F;index....</a><p>where is the cobol?

Cool!<p>What&#x27;s the deal with the <i>alternator</i> function (in app.js)? Why should keypresses be read only on every other attempt?<p>Also, is there some kind of implicit sleep or requestAnimationFrame somewhere? Or is it busy-looping and polling for key presses as fast as it can?

I do enjoy a good stunt, although it&#x27;s also fun to play while I wait for my bloated-ass executable to upload!

<a href="https:&#x2F;&#x2F;youtu.be&#x2F;st6-DgWeuos" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;st6-DgWeuos</a>

Can you get mobile browsers to open the keyboard? I can&#x27;t play. :(

Right paddle controls are backwards compared to vim.

Next step: both users playing over the network?

It seems very hard :-) Not the COBOL.