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
TypeScript
Crypto-Strong Random Password
Generate a strong random password in browser or modern Node. Uses crypto.getRandomValues with rejection sampling for an unbiased distribution.
@admin
TypeScript
Throttle (leading-edge, typed)
Pair to debounce: fire on the first call, then ignore further calls for `interval` ms. Useful for rate-limiting scroll handlers or button clicks.
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.
TypeScript
clamp / lerp / mapRange
Three numeric utilities you reach for constantly in animation, UI math, and audio code. Generic enough to use anywhere, no Math.* dance required.
TypeScript
zip — Pair Two Arrays
Pair items from two arrays positionally into tuples. The result's length is the shorter of the two inputs. Useful for parallel arrays (labels + values, headers + rows).
TypeScript
Debounce (typed)
Wait until the caller stops invoking for `delay` ms, then call the function with the most recent arguments. The TS version preserves the original signature so the returned function has the same parameters.
TypeScript
Type-Safe Event Emitter
A 30-line type-safe mini EventEmitter. The event-name → payload map is enforced at compile time, so emit and on calls can't drift apart.
TypeScript
invariant() — Always-On Assertion
Throw if a condition is false, with TypeScript narrowing the type afterwards. Replaces ad-hoc `if (!x) throw` ladders and gives you type-safe guards in one line.
Python
Word-Safe Truncate
Cap a string at `max_len` chars without splitting a word; append an ellipsis when truncated. Backs off to the last space if cutting mid-word would happen.
TypeScript
Mapped Types (Partial/Required/etc)
Mapped types iterate over keys to produce new types. The standard library's `Partial`, `Required`, `Readonly`, `Pick`, `Omit`, `Record` are all one-liners — and you can build your own.
TypeScript
groupBy (with key callback)
Group a list into a record keyed by whatever the callback returns. Like Lodash _.groupBy or the new Object.groupBy in modern runtimes. Generic enough to handle string, number, or symbol keys.
TypeScript
Deep Clone with structuredClone
Forget JSON.parse(JSON.stringify(...)) — modern runtimes (Node 17+, all current browsers) ship structuredClone, which handles Dates, Maps, Sets, typed arrays, and cycles correctly.
TypeScript
isWithinInterval — Date Range Check
Inclusive check that a date falls between two boundaries. Tiny but constantly useful for filtering rows by date range, validating bookings, etc.
TypeScript
safeJsonParse — Result-Typed
Parse JSON without ever throwing. Returns a Result-like discriminated union so callers must handle both success and failure paths at compile time.
TypeScript
Environment Variable Validator
Validate process.env at boot-time and exit fast if anything's missing. The returned object is typed so the rest of the code reads `env.DATABASE_URL` instead of `process.env.DATABASE_URL!`.
PHP
Try / Retry With Logging
Run a callable up to N times; log each failed attempt and bubble the last exception. Compact, no dependencies, useful for transient failures (S3 puts, email sends, etc.).