♻️ refactor solution for challenge 8

Author: jamerrq

src/challenges/08.ts

@@ -1,22 +1,16 @@
 export function organizeGifts (gifts: string): string {
   const giftsRegex = /(\d+)([a-z])/g
   const giftsMatches = gifts.matchAll(giftsRegex)
-  const giftsArray = Array.from(giftsMatches).map((match) => {
-    const [, count, symbol] = match
-    return { count: Number(count), symbol }
-  })
   let ans = ''
-  for (const { count, symbol } of giftsArray) {
-    let remainder = count
-    const pallets = Math.floor(remainder / 50)
-    remainder -= pallets * 50
-    const boxes = Math.floor(remainder / 10)
-    remainder -= boxes * 10
-    const bags = remainder
-    const palletsStr = `[${symbol}]`.repeat(pallets)
-    const boxesStr = `{${symbol}}`.repeat(boxes)
-    const bagsStr = `(${symbol.repeat(bags)})`.repeat(Math.min(1, bags))
-    ans += palletsStr + boxesStr + bagsStr
+  for (const match of giftsMatches) {
+    const [, qty, symbol] = match
+    let left = +qty
+    ans = `${ans}${`[${symbol}]`.repeat((left - (left % 50)) / 50)}`
+    left -= 50 * ((left - (left % 50)) / 50)
+    ans = `${ans}${`{${symbol}}`.repeat((left - (left % 10)) / 10)}`
+    left -= 10 * (left - (left % 10)) / 10
+    const x = ((left - 1) + ((left - 1) >> 31)) ^ ((left - 1) >> 31)
+    ans = `${ans}${`(${symbol.repeat(left)})`.repeat((left + 1 - x) / 2)}`
   }
   return ans
 }

src/tests/08.spec.ts

@@ -1,7 +1,7 @@
 import { test, expectTypeOf, expect, describe } from 'vitest'
 import { organizeGifts } from '../challenges/08'
 
-describe('Challenge Test Template', () => {
+describe('Challenge #08', () => {
   test('Test #01', () => {
     expectTypeOf(organizeGifts).returns.toEqualTypeOf('')
   })