Course of Raku / Advanced / More about built-in types / Enumerations 🆕 / Exercises / Count and total

Solution: Count and total

Here is a possible solution to the task.

Code

enum Coin (penny => 1, nickel => 5, dime => 10, quarter => 25);

say Coin.enums.elems;
say Coin.enums.values.sum;

🦋 You can find the source code in the file enum-introspection.raku.

Output

4
41

Comments

The constants are defined as pairs, so each one gets the value we chose rather than the automatic numbering from zero.
.enums returns a map from each constant name to its value. .elems counts the entries — there are four coins.
.values pulls out just the numbers behind the names, and .sum adds them up: 1 + 5 + 10 + 25 is 41.

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