zig concat

main.zig

const std = @import("std");

pub fn concat(bufs: []const []const u8) ![]const u8 {
    // var buf: [11]u8 = undefined;
    // var buffer = std.heap.FixedBufferAllocator.init(&buf);
    return std.mem.concat(std.heap.c_allocator, u8, bufs);
    // return std.mem.concat(&buffer.allocator, u8, bufs);
}

pub fn main() !void {
    var first = try concat(&[_][]const u8{ "hello ", "world" });
    defer std.heap.c_allocator.free(first);
    std.debug.print("{}\n", .{first});

    var sec = try concat(&[_][]const u8{ "test ", "two" });
    defer std.heap.c_allocator.free(sec);
    std.debug.print("{} {}\n", .{ first, sec });

    var thir = try concat(&[_][]const u8{ "xxxx ", "yyyyy" });
    defer std.heap.c_allocator.free(thir);
    std.debug.print("{} {} {}\n", .{ first, sec, thir });
}