https://thinkjrs.dev/blog A discretized collection of musings from thinkjrs. en-us jason@thinkjrs.dev (Jason R. Stevens, CFA) jason@thinkjrs.dev (Jason R. Stevens, CFA) Sat, 01 Nov 2025 00:00:00 GMT https://thinkjrs.dev/blog/combining-rust-and-nextjs-with-vercel-functions https://thinkjrs.dev/blog/combining-rust-and-nextjs-with-vercel-functions Using Vercel functions to run high-performance Monte Carlo simulations in Rust, integrated with a Next.js frontend for real-time visualization. Sat, 01 Nov 2025 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) RustNext.jsWebAssemblyVercelServerless https://thinkjrs.dev/blog/how-to-get-latitude-and-longitude-in-google-sheets https://thinkjrs.dev/blog/how-to-get-latitude-and-longitude-in-google-sheets Discover how to easily get latitude and longitude for addresses in Google Sheets using custom functions. Leverage Google's built-in Maps Geocoding service to avoid complex APIs and quickly pinpoint locations for your campaigns. Wed, 16 Jul 2025 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) Google SheetsGoogle WorkspaceApps ScriptBusinessGoogle Maps https://thinkjrs.dev/blog/cutup-rust-portfolio-allocation https://thinkjrs.dev/blog/cutup-rust-portfolio-allocation Announcing the release of Cutup, a Rust crate for portfolio allocation using MVO, HRP, and EW. Part of my upcoming book, soon to be a web app running directly in the browser. Sun, 09 Feb 2025 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) RustRust toolsDev toolsDevelopmentDeveloper tooling https://thinkjrs.dev/blog/chatgpt-hates-slack-too https://thinkjrs.dev/blog/chatgpt-hates-slack-too Wed, 22 Jan 2025 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) ChatGPTFunnyCodeSlackMetadata https://thinkjrs.dev/blog/rust-and-nextjs-with-webassembly https://thinkjrs.dev/blog/rust-and-nextjs-with-webassembly A quick and easy way to integrate Rust code into your Next.js applications Tue, 14 Jan 2025 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) RustNext.jsWebAssemblySoftwareWeb https://thinkjrs.dev/blog/a-little-example-of-traits-and-structs https://thinkjrs.dev/blog/a-little-example-of-traits-and-structs See Rust's trait and struct features work hand-in-hand by modeling the entire universe. Mon, 13 Jan 2025 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) RustTraitsCodeSoftwareStructs https://thinkjrs.dev/blog/using-criterion-to-benchmark-rust-code https://thinkjrs.dev/blog/using-criterion-to-benchmark-rust-code Rust's ecosystem for benchmarking is robust. Here's a dive into using my personal favorite, criterion.rs. Fri, 20 Dec 2024 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) RustBenchmarkingCodeSoftwareDeveloper tooling https://thinkjrs.dev/blog/using-the-as-const-assertion-in-typescript https://thinkjrs.dev/blog/using-the-as-const-assertion-in-typescript Provide immutability and a better developer experience for your TypeScript types using the as const assertion. In this article I detail how we do that at tincre.com. Thu, 19 Dec 2024 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) TypeScriptLanguage featuresSoftwareDevelopmentDeveloper tooling https://thinkjrs.dev/blog/what-is-cargo-expand https://thinkjrs.dev/blog/what-is-cargo-expand Reveal Rust macros with cargo-expand—a tool to simplify debugging and understand macro expansions in your projects. Mon, 09 Dec 2024 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) RustRust toolsDev toolsDevelopmentDeveloper tooling https://thinkjrs.dev/blog/html5-video-playsInline https://thinkjrs.dev/blog/html5-video-playsInline It turns out that the HTML5 video spec has an important attribute for mobile. Read more to dive into how that can affect your applications on mobile. Wed, 06 Nov 2024 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) TypeScriptJavaScriptHTML5Web App Development https://thinkjrs.dev/blog/simple-typescript-logger https://thinkjrs.dev/blog/simple-typescript-logger Hate those pesky log messages in your production apps? Here's what we do at Tincre to mangle our logs and more. Wed, 30 Oct 2024 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) TypeScriptJavaScriptReactTincreSoftware https://thinkjrs.dev/blog/python-tempfile-for-litellm-and-vertexai https://thinkjrs.dev/blog/python-tempfile-for-litellm-and-vertexai Use Python's tempfile for saving Google Cloud credentials locally when you call Vertex AI endpoints with LiteLLM Wed, 13 Mar 2024 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) PythonGCPVertex AITempfileGcloudAuth https://thinkjrs.dev/blog/gcp-auth-with-custom-credentials https://thinkjrs.dev/blog/gcp-auth-with-custom-credentials Do you store your application credentials for GCP service accounts on disk? Stop - there's a better way! Tue, 12 Mar 2024 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) PythonGCPVertex AIAuthenticationGcloudAuth https://thinkjrs.dev/blog/github-action-with-sed-in-the-middle https://thinkjrs.dev/blog/github-action-with-sed-in-the-middle Do you ever need to modify a string variable inside of a Github Action? This article will show you how to get it done. Fri, 16 Feb 2024 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) GNU/LinuxBash ScriptCLIGithubSedGithub ActionsCICD https://thinkjrs.dev/blog/simple-regex-inputs-using-chatgpt-for-mom https://thinkjrs.dev/blog/simple-regex-inputs-using-chatgpt-for-mom Do your users keep inputing characters in your input fields that cause failures? Do your developers fail to understand the basic domain requirements of these input fields? Learn how to ask ChatGPT for help! Wed, 24 Jan 2024 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) PythonJavaJavaScriptRegexDeveloper https://thinkjrs.dev/blog/indexing-and-slicing-arrays-in-javascript-and-other-languages https://thinkjrs.dev/blog/indexing-and-slicing-arrays-in-javascript-and-other-languages Dig into a simple outline of array indexing and slicing in JavaScript, Python and C++. Tue, 03 Oct 2023 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) JavaScriptSoftware developmentBeginnerBugsProgramming LanguagesPythonC++Go https://thinkjrs.dev/blog/simple-bug-hunting-formula https://thinkjrs.dev/blog/simple-bug-hunting-formula Do you hunt for bugs? If not, your software doesn't work. For those of you with working software, here's a formula for bug hunting successfully. Thu, 03 Aug 2023 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) PythonSoftware developmentPytestTestingBugs https://thinkjrs.dev/blog/merging-dictionaries-in-python https://thinkjrs.dev/blog/merging-dictionaries-in-python In this article learn a quick and simple strategy to merge dictionaries with Nonetype values for similar keys. Wed, 25 Jan 2023 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) PythonDictDictionariesDictionaryDeveloper https://thinkjrs.dev/blog/better-cron-emails https://thinkjrs.dev/blog/better-cron-emails Do you get a lot of 'cram' these days with all your cron jobs blasting you emails by default? Fri, 15 Jul 2022 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) GNU/LinuxBash ScriptCLICronCronic https://thinkjrs.dev/blog/automagically-increment-objects-in-python https://thinkjrs.dev/blog/automagically-increment-objects-in-python Do you loop through dictionaries to increment values? Of course you do! There's a better way... Wed, 15 Jun 2022 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) PythonStandard LibraryOOPCollectionsDeveloper https://thinkjrs.dev/blog/making-python-classes-json-serializable https://thinkjrs.dev/blog/making-python-classes-json-serializable Do you send data from Python to a web service? I bet you did not know your classes could be JSON serializable. Herein I'll show you how. Fri, 27 May 2022 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) PythonJSONOOPIteratorsDunder Methods https://thinkjrs.dev/blog/redoc-theming https://thinkjrs.dev/blog/redoc-theming Did you know that you can theme your Redoc component and app renders? I'll show you how in this article. Thu, 12 May 2022 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) ReactRedocOpenapiDocumentationAPI https://thinkjrs.dev/blog/why-i-fled-to-mexico https://thinkjrs.dev/blog/why-i-fled-to-mexico So you probably didn't notice because I didn't tell you -- I fled to Mexico, specifically, Mexico City. It's epic. Mon, 11 Apr 2022 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) mexicotravellife changesnomadicismlife https://thinkjrs.dev/blog/the-webs-last-mile https://thinkjrs.dev/blog/the-webs-last-mile How we're growing Tincre to focus on the web's last mile. Fri, 03 Dec 2021 00:00:00 GMT jason@thinkjrs.dev (Jason R. Stevens, CFA) Web Challenges In The 20sweb last miletincreweb-scale-problems