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
Bash
Generate UUID
Several portable ways to mint a v4 UUID from the shell — useful for request IDs, idempotency keys, temporary filenames.
@admin
Go
UUID Generation (google/uuid)
`github.com/google/uuid` is the standard UUID library. v4 (random) for IDs, v7 (time-ordered) when you want UUIDs that sort chronologically and play nicely with B-tree indexes.
SQL
UUID Primary Keys
UUIDs as PKs avoid sequence contention across services and let clients generate IDs offline. v4 is random (worst for B-tree indexes); v7 is time-ordered (B-tree friendly).
PHP
Validate UUID (any version)
Match the canonical 8-4-4-4-12 hex format, optionally pinning to a specific UUID version (1-5). Case-insensitive.
JavaScript
UUID v4 Generator
Generates a RFC 4122 compliant version-4 UUID. Uses crypto.randomUUID() in modern environments (Node 14.17+, all modern browsers) and falls back to a Math.random()-based implementation for older runtimes. The fallback is suitable for non-security-critical IDs such as UI element keys and local correlation IDs.