Created
April 26, 2020 14:23
-
-
Save peterwillcn/177c46463ec8822cd1a00e840cb751c0 to your computer and use it in GitHub Desktop.
Example of dynamic programming in Ruby
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| INFINITY = 1.0/0 | |
| @changes = {} | |
| @coins = [1, 3, 4] | |
| def change(target_value) | |
| return 0 if target_value == 0 | |
| return INFINITY if target_value < 0 | |
| @changes[target_value] ||= @coins.map do |coin| | |
| change(target_value - coin) + 1 | |
| end.min | |
| end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment