Tags
#php
#kotlin
#bash
#go
#sql
#rust
#typescript
#html
#java
#python
#files
#utils
#strings
#http
#concurrency
#async
#json
#arrays
#security
#types
#crypto
#database
#dates
#format
Kotlin
Sequences — Lazy Collections
A `List` materializes every intermediate `map`/`filter` result. A `Sequence` processes ONE element through the whole pipeline at a time — better for big inputs or short-circuiting (`first`, `take`).
@admin
Go
sync.Once — Lazy One-Time Initialization
Run a function exactly once, even from many goroutines. Standard pattern for lazy singletons, expensive setup, and one-time configuration.
TypeScript
Lazy Singleton (no class)
Lazily construct an expensive object exactly once, with TypeScript inferring the return type from the factory. Cleaner than the class-trait singleton pattern for module-scoped state.