@reduxjs/toolkit
Version:
The official, opinionated, batteries-included toolset for efficient Redux development
16 lines (14 loc) • 374 B
text/typescript
export function getOrInsert<K extends object, V>(
map: WeakMap<K, V>,
key: K,
value: V,
): V
export function getOrInsert<K, V>(map: Map<K, V>, key: K, value: V): V
export function getOrInsert<K extends object, V>(
map: Map<K, V> | WeakMap<K, V>,
key: K,
value: V,
): V {
if (map.has(key)) return map.get(key) as V
return map.set(key, value).get(key) as V
}