wip cloneArray

may not turn out to be useful though

lib/Group.zig

@@ -37,6 +37,25 @@ pub fn someMembers(
     return bufset;
 }
 
+// cloneArray clones an array of strings. This may be needed
+// to change members to []const []const u8
+fn cloneArray(allocator: Allocator, arr: []const []const u8) error{OutOfMemory}![]const []const u8 {
+    const total_len = blk: {
+        var sum: usize = 0;
+        for (arr) |elem| sum += elem.len;
+        break :blk sum;
+    };
+    var buf = try allocator.alloc(u8, total_len);
+    var ret = try allocator.alloc([]const u8, arr.len);
+    ret.len = arr.len;
+    for (arr) |elem, i| {
+        const old_len = buf.len;
+        mem.copy(u8, buf[old_len..], elem);
+        ret[i] = buf[old_len .. old_len + elem.len];
+    }
+    return ret;
+}
+
 const testing = std.testing;
 
 test "Group.clone" {