Tkd widget not finding row and column options - d

Question

I am trying to create a simple GUI application using tkd package and following code:
// modified from: https://github.com/nomad-software/tkd
import tkd.tkdapplication;
class Application : TkdApplication {
auto labellist = ["First", "Second", "Third", "Fourth", "Fifth", "Sixth", ];
override protected void initInterface() {
int ncol =0;
auto frame = new Frame(2, ReliefStyle.groove);
frame.pack(10);
foreach(lab; labellist){
auto label = new Label(frame, lab);
label.grid(row=nrow, column=0);
auto entry = new Entry(frame);
entry.grid(row=nrow, column=1);
nrow += 1;
}
auto exitButton = new Button(frame, "Exit").setCommand(&this.exitCommand).pack(10);
}
private void exitCommand(CommandArgs args) {
this.exit();
}
}
void main(string[] args){
auto app = new Application();
app.run();
}
However, it is giving following error:
$ dub run
Performing "debug" build using /usr/bin/dmd for x86_64.
x11 1.0.21: target for configuration "tcltk-import" is up to date.
tcltk 8.6.5: target for configuration "library" is up to date.
tkd 1.1.12: target for configuration "library" is up to date.
tkdgui ~master: building configuration "application"...
source/app.d(15,15): Error: undefined identifier row
source/app.d(15,25): Error: undefined identifier column
source/app.d(17,15): Error: undefined identifier row
source/app.d(17,25): Error: undefined identifier column
source/app.d(18,4): Error: undefined identifier nrow
/usr/bin/dmd failed with exit code 1.
Details about grid are mentioned here. Row and column are valid options to be entered.
Where is the problem and how can it be solved.

Answer 1

There are two issues in your code. Here's the first:
label.grid(row=nrow, column=0);
^^^^ ^^^^^^^
D does not support named parameters, which you're attempting to use. Instead you will need to use positional parameters:
label.grid(0, nrow);
FWIW, there are some proposals to add named parameters to D, but none are in the language as of now.
The second issue is nrow is not defined anywhere. Judging by the existence of ncol and the fact it's used nowhere, it seems you changed the code from dealing with columns to dealing with rows and did not change the name of ncol to nrow.