g2601_2700.s2623_memoize.solution.ts Maven / Gradle / Ivy

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Java-based LeetCode algorithm problem solutions, regularly updated

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// #Medium #2023_08_31_Time_264_ms_(97.20%)_Space_109.2_MB_(32.97%)

type Fn = (...params: any) => any

function memoize(fn: Fn): Fn {
    const mem_args: Map = new Map()
    return function (...args) {
        const args_str = args.toString()
        if (mem_args.has(args_str)) {
            return mem_args.get(args_str)
        }

        const result = fn(...args)
        mem_args.set(args_str, result)
        return result
    }
}

/*
 * let callCount = 0;
 * const memoizedFn = memoize(function (a, b) {
 *	 callCount += 1;
 *   return a + b;
 * })
 * memoizedFn(2, 3) // 5
 * memoizedFn(2, 3) // 5
 * console.log(callCount) // 1
 */

export { memoize }