Folder structure

The following structure includes components that we will wind up building in this very chapter:

|Expenses 
|__app 
|____components 
|______AddExpenses 
|______AddExpensesModal 
|______CurrentMonthExpenses 
|______EnterBudget 
|______ExpandableCell 
|______ExpenseRow 
|____utils 
|______dateMethods.js 
|______storageMethods.js 
|____App.js 
|____styles.js 
|__ios 
|__index.ios.js 

Utilities

The utils folder stores helper methods that we will be using in our application. The dateMethods deals with the different methods that we will use to get different parts of the date, while storageMethods handles access to AsyncStorage.

Our first bullet point from app planning says that upon launching the app, if a budget for this month has not yet been set, it should ask the...