The Book Every Programmer Should Read

Written on October 19, 2018

Writing code that any programmer who read can understand is a must-have skill for software developers. The fact is: only 20% of the programmers have the ability.

“Any fool can write code that a computer can understand. Good programmers write code that humans can understand.” — Martin Fowler

When I started caring about code readability I noticed that my code started to be:

  • easier to maintain
  • easier to refactor
  • reusable
  • consistent

The book

Robert “Uncle Bob” Martin’s “Clean Code: A Handbook of Agile Software Craftsmanship” is the clean coder programmer bible. This book talks about code, behaviour, automated tests and so on.

Let’s get practical! Writing meaningful names.

One of Clean Code chapters talks about meaningful naming. In this story, you are going to be the code reader. Take a look at this function:

def calc(n1, n2)
  return n1 / n2
end

Do you think calc is a good name for this function? Uncle Bob would say: no! Why?

  1. calc is an abbreviation: don’t!
  2. Functions do something. It must be named with a verb.
  3. Even I rename calc to calculate, it still be vague. We need to improve the semantics by giving the function name more meaning.

This function divides two numbers. divide is a good name for it.

def divide(n1, n2)
  return n1 / n2
end

result = divide(1, 2)

We still have problems with it. “n1” and “n2”, the parameters, are not semantic. What if we call them “dividend” and “divisor”? The same thing to the “result” variable. It should be called something like “quotient”.

def divide(dividend, divisor)
  return dividend / divisor
end

quotient = divide(1, 2)

Much more semantic!

If you are not convinced to read this book yet, take a look in this picture and buy this must-read book!