https://coderrob.com/tags/async-programming/Recent content in Async Programming on CoderrobHugoen-USWed, 22 Oct 2025 21:00:00 -0500https://coderrob.com/posts/javascript-promise/Wed, 22 Oct 2025 21:00:00 -0500https://coderrob.com/posts/javascript-promise/<p>A <code>Promise</code> is a guaranteed placeholder value for what a function or series of functions will return.</p> <p>It&rsquo;s a <em>promise</em> to return a value eventually.</p> <blockquote> <p>The function swears this time is different. You can trust it. It swears it&rsquo;ll get it back to you in no time.</p> </blockquote> <p>If you haven&rsquo;t already, check out my post on <a href="../javascript-callbacks">JavaScript Callbacks</a> where we dove into callback hell and why we desperately needed something better. Spoiler: Promises are that something better.</p>https://coderrob.com/posts/javascript-callbacks/Mon, 03 May 2021 15:00:00 -0500https://coderrob.com/posts/javascript-callbacks/<h2 id="brief-history-of-callbacks">Brief History of Callbacks</h2> <p>It all starts with the callback function.</p> <p>A callback function is just a plain JavaScript function that is passed into another function as an argument.</p> <p>That&rsquo;s it. Nothing special.</p> <p>This callback function can be used to return data, or to signal that some event took place.</p> <p>If you&rsquo;ve worked with web development you&rsquo;ve definitely crossed paths with callbacks.</p> <p>Think of a button <code>click</code> event for a web page.</p>