Chapter case example

An important part of every program is efficiency. In many cases, we can time our methods and find bottlenecks in our applications. Let's look at an example program that we will try and time afterwards.

We will have a look at parsing. In many real-life applications, we have to read data in specific formats and parse it to the objects in our code. For this example, we will have a small database of people represented in a JSON format:

[
  {
    "firstName": "Ivan",
    "lastName": "Nikolov",
    "age": 26
  },
  {
    "firstName": "John",
    "lastName": "Smith",
    "age": 55
  },
  {
    "firstName": "Maria",
    "lastName": "Cooper",
    "age": 19
  }
]

To represent this JSON in Scala, we have to define our model. It will be simple and contain only one class: Person. Here is the code for it:

case class Person(firstName: String, lastName: String, age: Int)

Since we will be reading JSON inputs, we will have to parse them. There are many parsers out there, and everyone might...