Select in Idris
Our example demonstrates how to wait on multiple channel operations using a select-like construct in Idris. This is a powerful feature that combines effects and concurrency.
In this Idris version, we use IORef
s to simulate channels, and fork
to create concurrent threads. The selectIO
function is used to wait on multiple IO actions, similar to Go’s select
.
To run the program, you would compile it with the Idris compiler and then execute the resulting binary:
Note that the total execution time is only ~2 seconds since both the 1 and 2 second delays execute concurrently.
It’s important to note that Idris doesn’t have built-in channels or a direct equivalent to Go’s select
statement. This example demonstrates a way to achieve similar functionality using Idris’s concurrency primitives and the selectIO
function from the System.Concurrency
module. The exact behavior may differ slightly from Go’s select
, especially in terms of fairness and randomness of selection.