In this first chapter, you'll learn what defensive programming is,  and how to use existing packages for increased efficiency. You will then learn to manage the packages loaded in your environment and the potential conflicts that may arise.

Defensive R Programming

Real Programmers...

Don't reinvent the wheel/package

Updating Packages

Out of Date Packages

Task Views

Packages and Namespaces

Number of Loaded Packages

Counting Exported Functions

The Conflicted Package

Avoiding Conflict

Programming is simpler when you get feedback on your code execution. In R, we use messages, warnings and errors to signal to keep the user informed. This chapter will discuss when and where you should use these communication tools.

Sistem peringatan dini

To TRUE or not to T

Mari jadi jahat

Jika bukan karena anak-anak usil itu

Pesan dalam botol

Apakah Anda menerima pesannya?

Menyembunyikan pesan saat awal pemuatan

Berhenti berisik!!!

Menggunakan message dalam praktik

Anda sudah diperingatkan

Pesan vs Peringatan

Menekan peringatan

Berhenti (sekarang juga)

Peringatan vs Stop

Menggunakan fungsi stop()

Early warning systems

We can avoid making mistakes using a consistent programming approach. In this chapter, we will introduce you to R best practices.

Preparing your defences

What does DRY mean?

Refactoring: functions

Just one comment

Header comments

A little bit dotty

Use a full stop in variable names

Avoiding the .

Coding Style

Importance of consistent style

Static Code Analysis for R

Code tidying

More linting

Preparing your defenses

Creating a script is nice, but working on a project with several scripts and assets requires structure. This final chapter will teach you good organization practices, so you can go from script to package with an optimal workflow.

A battle plan

The importance of consistency

Give me some space

Human readable filenames

What date format should we use?

Organizing a project

Avoiding absolute directories

The input/ directory

Absolute vs relative

Graphics and output

Generating graphics

Graphics/

One final work flow

Creating a Battle Plan

Menulis skrip R itu mudah. Menulis kode R yang baik itu sulit. Dalam kursus ini, kita akan membahas pemrograman defensif—serangkaian teknik standar yang membantu mengurangi bug dan memudahkan kerja tim. Kita akan meninjau teknik untuk menghindari kesalahan umum serta cara menangani kesalahan yang tak terelakkan dalam kode kita. Kursus ini akan ditutup dengan membahas kapan saat yang tepat untuk beralih dari skrip ke proyek hingga menjadi paket.

Intermediate R

Pelajari cara membuat kode kuat dengan teknik pemrograman defensif di R untuk menghindari kesalahan.

Pemrograman R Defensif

Pelajari pemrograman defensif dalam R untuk membuat kode Anda lebih tangguh.

Pengembang R

To TRUE or not to T

Pemrograman R Defensif

Latihan interaktif praktis