Practical guides for developers. Ideas for building and running software.
You are about to ship a REST or JSON API. Before production, you need to know whether the server survives requests you did not intend: wrong tokens, another user's object…
Rust's async/await syntax lets you write functions that pause and resume, but the standard library does not include the code…
When your TypeScript code calls fetch, the request keeps running until the server responds, even if the user has navigated…
The Cache-Control header on an HTTP response tells browsers, content delivery networks (CDNs), and other intermediary caches what they may…
An LLM can return JSON that is not the JSON your code expects. Structured output means the model produces text…
When you push a commit, open a pull request, or finish a review, GitHub can respond by running a workflow:…
Go 1.21 added two generic packages, maps and slices, to the standard library. Generic means the functions work with any…
You write Terraform configuration for infrastructure your team or company runs. You have a directory of.tf files that creates, say,…
Go treats errors as values. A function that can fail returns an error as its last result, and the caller…
A regression is a behavior that used to work and now does not. When one appears, you usually know two…
A container that exits with code 137 has been terminated by a SIGKILL signal, which the operating system uses to…
When your service changes business data and also needs to trigger background work, you have to keep two systems in…
Go's built-in map type is a hash table. A hash table stores key-value pairs and uses a hash function, a…
When you run several coroutines at once with Python's asyncio library, you need a way to stop them together when…
When you write an object literal and want TypeScript to check that it fits a known shape, the two familiar…
