[tns8] Hello Workspace app

1. from windows cmd:

   tns create helloWorkspace

2. at helloWorkspace/app level ensure: [tns8] Embedding S8 environment in your app
3. replace default stackLayout code in /helloWorkspace/app/main-page.xml with:

   <StackLayout class="p-20">
           <Label text="Tap to evaluate an S8 expression" class="h1 text-center"/>
   	<TextField id="s8expression" hint="s8 expression" text="{{ s8expression }}" />
           <Button text="showIt" tap="{{ onTap }}" class="btn btn-primary btn-active"/>
           <Label id="evaluation" text="{{ evaluation }}" class="h2 text-center" textWrap="true"/>
   </StackLayout>

4. replace default /helloworld/app/main-view-model.js with:

   var Observable = require("data/observable").Observable;
   var s8 = require("./s8");
   
   function createViewModel() {
       var viewModel = new Observable();
       viewModel.s8expression = "Smalltalk classes size";
       viewModel.evaluation = "[tap to get result of evaluation]";
   
       viewModel.onTap = function() {
   	this.set("evaluation",viewModel.s8expression.showIt());
       }
   
       return viewModel;
   }
   
   exports.createViewModel = createViewModel;

5. to run the app in
   • android execute:

     tns run android

   • iOS execute:

     ins run iOS