Practical guides for developers. Ideas for building and running software.
SQLite returns "database is locked" (SQLITE_BUSY) when a connection tries to write but cannot get the write lock in time. The message means another connection holds the lock, or the…
A webhook is an HTTP request a provider sends to your server when something happens: a payment succeeds, an account…
The OWASP API Security Top 10 lists the most common and damaging ways APIs fail, published by the Open Worldwide…
When you need to look up a value by a key in Go, a map is the built-in tool. A…
When you write Go code that stores a sequence of values, you choose between two built-in types: arrays and slices.…
When your Symfony application exposes endpoints to the public internet, some clients will send more requests than you want to…
Your software authenticates someone when it decides whether they are who they claim to be. You implement authentication when you…
Each AI API call runs a model, which costs the provider money and uses scarce GPU capacity. That is why…
A Terraform codebase that worked fine for one environment eventually starts fighting you: Terraform takes minutes to produce a plan…
When you run infrastructure on AWS, Azure, and Google Cloud, you write Terraform configuration that talks to each cloud's API…
A slice in Go is a window onto an array: the slice value you hold in a variable is a…
Go 1.21 added the generic slices and maps packages to the standard library. Before that, the same utility functions lived…
When you write m := make(map[string]int) in Go, the runtime creates a hash table, not a simple list of pairs.…
Go added generics in version 1.18. The mechanism is the type parameter: a placeholder type that a function declares in…
structuredClone is a built-in JavaScript function that makes a deep copy of a value. A deep copy duplicates the value…
