The latest articles on Forem by Matthew Simpson (@smatthew). https://forem.com/smatthew https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3584798%2F95e8ffb0-fc6c-48a2-9164-0ce947bfc881.jpg https://forem.com/smatthew en Matthew Simpson Sat, 03 Jan 2026 18:57:57 +0000 https://forem.com/smatthew/coordconversions-demo-2pl7 https://forem.com/smatthew/coordconversions-demo-2pl7 <p>Here's a quick demo pen for CoordConversion, the library I made to help convert back and forth between Decimal Degree, Degrees-Minutes, and Degrees-Minutes-Seconds map coordinates.</p> <p>Yes, this is both a super-niche and super-useful thing. Yes I am patting my own back a bit. </p> <p> <iframe height="600" src="https://codepen.io/matthewcsimpson/embed/RNrYdXv?height=600&amp;default-tab=result&amp;embed-version=2"> </iframe> </p> codepen programming webdev npm Matthew Simpson Fri, 14 Nov 2025 21:58:01 +0000 https://forem.com/smatthew/solving-leetcode-0020-valid-parentheses-in-four-different-ways-5el5 https://forem.com/smatthew/solving-leetcode-0020-valid-parentheses-in-four-different-ways-5el5 <p>I wrote a pretty in depth look at the valid parenthesis problem over on medium, including four separate solutions. </p> <p><a href="https://medium.com/@mcsimpson/solving-leetcode-0020-valid-parentheses-in-four-different-ways-bf3cf0b2098e" rel="noopener noreferrer">Check it out</a>!</p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fln0pl5ozanvhofgczjkg.webp" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fln0pl5ozanvhofgczjkg.webp" alt=" " width="800" height="231"></a></p> coding leetcode typescript javascript