Data commit

Task/Copy-a-string/Zig/copy-a-string.zig

@@ -0,0 +1,22 @@
+const std = @import("std");
+
+const debug = std.debug;
+const mem = std.mem;
+
+test "copy a string" {
+    const source = "A string.";
+
+    // Variable `dest1` will have the same type as `source`, which is
+    // `*const [9:0]u8`.
+    const dest1 = source;
+
+    // Variable `dest2`'s type is [9]u8.
+    //
+    // The difference between the two is that `dest1` string is null-terminated,
+    // while `dest2` is not.
+    var dest2: [source.len]u8 = undefined;
+    mem.copy(u8, dest2[0..], source[0..]);
+
+    debug.assert(mem.eql(u8, dest1[0..], "A string."));
+    debug.assert(mem.eql(u8, dest2[0..], "A string."));
+}