Tutorial by Topics: oninit

The only requirement for an object to be initialized using this syntactic sugar is that the type implements System.Collections.IEnumerable and the Add method. Although we call it a collection initializer, the object does not have to be an collection.

In respect of ionic2 the constructor: in simple terms we use it to create instance of our plugins, services etc. for example: You have a page(view) where you want to show the list of all students, and you have a json file that contains all the students (this file is your data file) what you have to ...