13 lines
258 B
JavaScript
13 lines
258 B
JavaScript
|
function memo (func) {
|
||
|
|
let cache = new Map()
|
||
|
|
|
||
|
|
return (...args) => {
|
||
|
|
let argStr = args.toString(), result
|
||
|
|
if ((result = cache.get(argStr)) === undefined) {
|
||
|
|
result = func(...args)
|
||
|
|
cache.set(argStr, result)
|
||
|
|
}
|
||
|
|
return result
|
||
|
|
}
|
||
|
|
}
|