tv4 | Tiny Validator for JSON Schema v4 | JSON Processing library

To make your function work use e.g. {{col}} instead of !!col. To make your function work for multiple vars you can use the ... notation which you can also use to pass the variables to group_by:

I Think the easiest way ist to use the bootstrap css for this. What we can do is to add the classes for columns and rows just in the sameway as we do when we use the fluidRow and 'column' in shiny. For example a column(width = 2) is actually just a div with the class=col-md-2.

We can use jquery to add these classes to the radio buttons with the javascript code $('.radio-inline').addClass('col-md-3'); to make thise work properly we need to add the class row to the parent tag $('.shiny-options-group').addClass('row'); To do this in shiny we add the following code after the radio button

The problem might be related to filedata() <- filedata()... where filedata() is a reactive expression. That assignment may be causing an error.

Consider creating a reactiveValues object (rv) containing your data, where you can add columns, change column names, etc. Note the use of observe that will be used to read in the file, and assign the data frame (df) to rv.

Perhaps when the box is checked, an observeEvent expression will be called, and your columns can be added there. Note that you do not need to put your output$column_names inside this, as it will be updated automatically.

If this does not work, or doesn't help, let me know. However, it might more helpful if you are able to provide a complete but minimal reproducible example in shiny.

You just change GridLayout width

android:layout_width="match_parent" to

The items keyword can take a schema, or an array of schemas and it has different semantics depending on which version is being used.

When items takes a single schema, it's describing an array where all items in the array must conform to the given schema.

I would recommend moving away from tv4 for schema validations and use the built-in jsonSchema function, as this uses AJV.

Apart from that, your schema didn't look right and was missing the validation against the object, it looks like it was doing it against the array.

This might help you out:

There is no need to store every card in onPause() method. We will only write new card in sharedPref as prev cards are already presen in sharedPref. So when you are trying to save the prev cards in the loop, there is a problem.( writing blank value).

You have to made change for quantity in your model when click + or - button. So you have to add cartInfo.setQty(totalQty); inside your button clicks

Don't use global variables if you are using variable inside onBind()

I found my answer and its working, below is the code: