A lot of data? An array!

Muffin was wagging his tail pensively and squinting at your code. Then he took his tired eyes off the monitor, dialed the familiar number on the pager and said with a sigh: “hi team lead, tell this rooky about refactoring”.

Surprisingly, the video blog was able to survive long enough, and today Muffin sent us data for the last month:

817, 1370, 752, 1247, 681, 1120, 915, 1281, 875, 1341, 757, 610, 812, 1170, 769, 1261, 845, 1289, 515, 1247, 845, 1311, 741, 1239, 812, 638, 877, 1242, 1159, 1372

To analyze this data, you will have to add 26 more variables to the current program. A lot of writing? We are about to get data for the year, too.

Your program works correctly, but adding new data to it is extremely time-consuming. Therefore, it’s time to refactor. Refactoring is rewriting a program, after which it should work the same way, but be more flexible. The purpose of our refactoring is to reduce the complexity of adding and modifying massive amounts of data.

Fortunately, there is a way to store massive data. This method is called an array. An array is a data type, which is a list of elements, each of which has its own sequence number.

Arrays are created using the so-called literal array or square brackets. Inside the brackets, comma-separated lists contain all values ​​that an array must contain. When you create an array, like any value, you can write it to a variable:

var numbers = [1, 2, 3, 4, 5];

In the array you can store any data: strings, Boolean values, numbers and even other arrays.

We will do refactoring smoothly, without deleting the entire program, but rewriting its parts instead. At the first stage, we get rid of the individual variables for the data:

1. Let’s temporarily set the average value to zero.
2. Then create an array, in which we transfer the values ​​from the variables.
3. And transfer this array to command muffin.plot() instead of variables (fortunately, the command can work with arrays).
4. Now, when the variables for the data in the program are no longer used, we can go ahead and delete them.