Panduan Kejuruteraan: Hire a Freelance Programmer for Promotion Stacking & Loyalty Ledger Engines. Aldian Fazrihady ialah Programmer Bebas Kanan & Jurutera AI (Python, Django, FastAPI, React, Next.js, TypeScript, Golang).
Prevent coupon abuse and rounding penny-drift across BOGO deals, tiered cart discounts, and loyalty point redemptions by hiring senior freelance programmer Aldian Fazrihady.
def prorate_discount_across_items(item_subtotals: list[int], total_discount: int) -> list[int]:
cart_sum = sum(item_subtotals)
if cart_sum <= 0 or total_discount <= 0:
return [0] * len(item_subtotals)
raw = [(s * total_discount) // cart_sum for s in item_subtotals]
remainder = total_discount - sum(raw)
for i in range(remainder):
raw[i % len(raw)] += 1
return raw