mirror of
https://github.com/TheAlgorithms/JavaScript.git
synced 2025-07-20 02:23:24 +08:00
6656ece534
* feat: improved memoize function used Map instead of object & used the JSON.stringfy method for generate a valid string as a key * docs: modified documentation * style: format with standard * docs: modified stringify doc * refactor: remove two repetition implementation
65 lines
2.1 KiB
JavaScript
65 lines
2.1 KiB
JavaScript
import { memoize } from '../Memoize'
|
|
import { fibonacci } from '../../Dynamic-Programming/FibonacciNumber'
|
|
import { factorial } from '../../Recursive/Factorial'
|
|
|
|
const multipleFactorials = (arr) => arr.map(factorial)
|
|
|
|
/**
|
|
* @title implementation of union function
|
|
* @param {Set} sets
|
|
* @return {new Set}
|
|
*/
|
|
function union (...sets) {
|
|
return new Set(
|
|
sets.reduce((flatArray, set) => [...flatArray, ...set], [])
|
|
)
|
|
}
|
|
|
|
describe('Testing Memoize', () => {
|
|
it('expects the fibonacci function to use the cache on the second call', () => {
|
|
const memoFibonacci = memoize(fibonacci)
|
|
|
|
expect(memoFibonacci(5)).toEqual(fibonacci(5))
|
|
expect(memoFibonacci(5)).toEqual(5)
|
|
expect(memoFibonacci(10)).toEqual(fibonacci(10))
|
|
expect(memoFibonacci(10)).toEqual(55)
|
|
})
|
|
|
|
it('expects the factorial function to use the cache on the second call', () => {
|
|
const memoFactorial = memoize(factorial)
|
|
|
|
expect(memoFactorial(5)).toEqual(factorial(5))
|
|
expect(memoFactorial(5)).toEqual(120)
|
|
expect(memoFactorial(10)).toEqual(factorial(10))
|
|
expect(memoFactorial(10)).toEqual(3628800)
|
|
})
|
|
|
|
it('expects the multipleFactorials function to use the cache on the second call', () => {
|
|
const memoMultipleFactorials = memoize(multipleFactorials)
|
|
const input = [2, 3, 4, 5]
|
|
|
|
expect(memoMultipleFactorials(input)).toEqual([2, 6, 24, 120])
|
|
expect(memoMultipleFactorials(input)).toEqual(multipleFactorials(input))
|
|
})
|
|
|
|
it('expects the multipleFactorials function to use the cache on the second call', () => {
|
|
const memoMultipleFactorials = memoize(multipleFactorials)
|
|
const input = [2, 3, 4, 5]
|
|
|
|
expect(memoMultipleFactorials(input)).toEqual([2, 6, 24, 120])
|
|
expect(memoMultipleFactorials(input)).toEqual(multipleFactorials(input))
|
|
})
|
|
|
|
it('expects the union function to use the cache on the second call', () => {
|
|
const memoUnion = memoize(union)
|
|
const inputs = [
|
|
new Set([1, 2, 3]),
|
|
new Set([4, 3, 2]),
|
|
new Set([5, 3, 6])
|
|
]
|
|
|
|
expect(memoUnion(...inputs)).toEqual(new Set([1, 2, 3, 4, 5, 6]))
|
|
expect(memoUnion(...inputs)).toEqual(union(...inputs))
|
|
})
|
|
})
|