Course of Raku / Functional, concurrent, reactive, and web programming / Reactive programming / react and whenever / Exercises

Two whenevers

Problem

Track a bank balance fed by two streams with opposite roles. Create two named supplies — deposits from 100, 50, 200 and withdrawals from 30, 120 — and, in one react block with two whenever blocks, add every deposit to the balance and subtract every withdrawal from it. Print the final balance.

Example

The program prints:

200

Solution

✅ See the solution

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