Why can't I post this to Stack Overflow? It's giving me an error [closed]

Question

Error Message:

Oops! Your question couldn't be submitted because:

Please add some context to explain the code sections (or check that you have not incorrectly formatted all of your question as code).

How do I fix this issue?

It says that I need to explain my code more when I try to post this as google-apps-script. I have explained almost every part of the code. Also, this code was posted previously and I just added a few extra lines with explanations.

What do they mean by "context"

function doGet() {
  var app = UiApp.createApplication();
  //Create listBox
  var listBox = app.createListBox();
  //Add items to listBox
  listBox.addItem("item 1").addItem("item 2").addItem("item 3").setName("myListBox");
  //Create hidden app
  var hidden = app.createHidden().setName('hidden').setId('hidden')
  //Create button handler
  var handler = app.createServerHandler("buttonHandler");
  // pass the listbox into the handler function as a parameter and the hidden widget as well
  handler.addCallbackElement(listBox).addCallbackElement(hidden);

  //Create flextable
  var table = app.createFlexTable().setId("myTable");

  //Create flex table style attributes
    table.setStyleAttribute("border-style", "solid")
    table.setStyleAttribute("border-width", "1px")
    table.setCellPadding(1);



  //Create flex table headers
  table.setWidget(0, 0, app.createLabel("Product Type")).setStyleAttribute("color", "blue");
  table.setWidget(0, 5, app.createLabel("Size"));

  var button = app.createButton("+", handler);

  // add all widgets to the app
  app.add(table).add(hidden);
  app.add(listBox).add(button)
  return app;
}

function buttonHandler(e) {
  var app = UiApp.getActiveApplication();
  // get the position (is a string)
  var pos = e.parameter.hidden;
  // initial condition, hidden widget is empty
   if(pos==null){pos='0'};
  // convert to number
   pos=Number(pos);
  var table = app.getElementById("myTable");
  // add the new item at the right place
  table.insertRow(pos).insertCell( pos, 0).setText(pos, 0, e.parameter.myListBox);
  // increment position
  ++pos;
  // save value
  app.getElementById('hidden').setValue(pos);
  // update app
  return app;
}

Answer 1

Stack Overflow wants questions. That means that you have to ask an actual question, in text. You should probably include code to provide necessary context, but the actual question should be in text, in a paragraph preceding the code.

And no, comments in the code-block itself don't count.

Answer 2

I presume the system is rejecting your post because it's one big code block. It's not the code itself that you need to explain (most of your comments are entirely unnecessary anyway), it's the error - what you're trying to do with the code and, as jmort said, the precise error message. And you should read and at least try to understand the error message before posting.