Looping through multi dimensional array

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1

Is it possible to loop through a multi dimensional array (updating its values) in a ‘single dimensional’ way? I don’t like these nested loops.

2

You should be able to @ptrCast from the multidimensional to a single slice.

const std = @import("std");
pub fn main() !void {
    var multi: [5][10]u8 = .{
        .{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 },
        .{ 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 },
        .{ 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 },
        .{ 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 },
        .{ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50 },
    };

    const single: []u8 = @ptrCast(&multi);

    for (single) |value| {
        std.debug.print("Value {d}\n", .{value});
    }
}

I was able to build this and run it as expected using 0.15.2

5 Likes
3

Thanks! Works as expected.