const std = @import("std");

const defaultString = "deef";
const structOfString = struct {
    first:  []const u8 = defaultString,
    last:   []const u8 = defaultString,
};

const listOfStruct = std.MultiArrayList(structOfString);

const testStrings = [_][]const u8{
    "foo",
    "bar",
    "baz",
    "foz"
};

pub fn main() !void {
    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
    
    var list = listOfStruct{};
    defer list.deinit(gpa.allocator());

    for(testStrings, 0..) |line, idx| {
        const paddedLine = try std.fmt.allocPrint(gpa.allocator(), "{s: ^10}", .{line});
        const new = switch(idx) {
            0 => structOfString{.first = paddedLine},
            else => structOfString{},
        };
        std.debug.print("new: {s}\n", .{new.first});
        try list.append(gpa.allocator(), new);
    }
    for(list.items(.first), list.items(.last)) |first, last| {
            std.debug.print("existing: {s}, {s}\n", .{first, last});
    }
}