We help IT Professionals succeed at work.
Get Started

Design proper algorithm for lucky draw chances?

955 Views
Last Modified: 2018-08-10
This could be an easy question and in fact, this is simple. But just wondering what's the proper algorithm for lucky draw chances?

Let's say in every new deposit amount of X get a no of chances of Y. Providing X = $1000, Y = 1

If there's a customer A credited $10000, he got 10 chances in this month.
If there's a customer B credited $2000, he got 2 chances in this month.
If there's a customer C credited $100, he got 0 chances in this month.
If there's a customer D credited $3500, he got 3 chances in this month.

By end of this month, how do I use a proper algorithm to pick a lucky draw winner? That's to pick a winner among this 15 chances.

One of the approaches is to create multiple chances in a temp table, and then random a position to pick the winner. But my question is what if the total no of chances is a very big number? Will the process of populating this temp table become slow?

Thank you.
Comment
Watch Question
CERTIFIED EXPERT
Top Expert 2016
Commented:
This problem has been solved!
Unlock 1 Answer and 12 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE