What Is a CharacterSet? — a CharacterSet is a struct defined in Foundation Framework. It represents certain character arrays like; decimal digits (CharacterSet.decimalDigits) white space characters (CharactersSet.whitespaces), lowercase letters (CharacterSet.lowercaseLetters) illegal characters (CharacterSet.illegalCharacters) punctuation characters (CharacterSet.punctuationCharacters) and many more.

Let's create a ListView with section headers in React Native. First, we need a suitable data to show with sections and rows. I copied this data from a pizza restaurant menu. var menuData = { menu : [ { menuSectionId …