Code Explainers

Code explainers tagged #generics

typescript 
// A module-scoped Singleton: the single instance lives in this module's
// closure and is never exposed directly.
 
interface AppConfig {

A module-scoped Singleton in TypeScript

singleton generics encapsulation
Intermediate 7 steps
typescript 
interface RetryOptions {
  retries?: number;
  baseDelayMs?: number;
  maxDelayMs?: number;

Retrying async tasks with exponential backoff

retry exponential-backoff async
Intermediate 8 steps
rust 
use std::thread;
 
pub fn parallel_map_reduce<T, M, R, F, G, H>(
    data: &[T],

A parallel map-reduce with scoped threads

concurrency scoped-threads map-reduce
Advanced 8 steps
typescript 
type NestedArray<T> = Array<T | NestedArray<T>>;
 
function flatten<T>(input: NestedArray<T>): T[] {
  const result: T[] = [];

Recursively flattening nested arrays in TypeScript

recursion recursive-types generics
Intermediate 7 steps
typescript 
class LRUCache<K, V> {
  private readonly capacity: number;
  private readonly map: Map<K, V>;
 

Building an LRU cache on a JS Map

caching data-structures generics
Intermediate 8 steps