Book Image

Understanding Software

By : Max Kanat-Alexander
Book Image

Understanding Software

By: Max Kanat-Alexander

Overview of this book

In Understanding Software, Max Kanat-Alexander, Technical Lead for Code Health at Google, shows you how to bring simplicity back to computer programming. Max explains to you why programmers suck, and how to suck less as a programmer. There’s just too much complex stuff in the world. Complex stuff can’t be used, and it breaks too easily. Complexity is stupid. Simplicity is smart. Understanding Software covers many areas of programming, from how to write simple code to profound insights into programming, and then how to suck less at what you do! You'll discover the problems with software complexity, the root of its causes, and how to use simplicity to create great software. You'll examine debugging like you've never done before, and how to get a handle on being happy while working in teams. Max brings a selection of carefully crafted essays, thoughts, and advice about working and succeeding in the software industry, from his legendary blog Code Simplicity. Max has crafted forty-three essays which have the power to help you avoid complexity and embrace simplicity, so you can be a happier and more successful developer. Max's technical knowledge, insight, and kindness, has earned him code guru status, and his ideas will inspire you and help refresh your approach to the challenges of being a developer.
Table of Contents (50 chapters)
Understanding Software
About the Author
Customer Feedback
The Engineer Attitude
The Singular Secret of the Rockstar Programmer
Software Design, in Two Sentences
Clues to Complexity
Ways To Create Complexity: Break Your API
When Is Backwards-Compatibility Not Worth It?
Complexity is a Prison
The Accuracy of Future Predictions
Simplicity and Strictness
Two is Too Many
What is a Bug?
What is a Computer?
The Components of Software: Structure, Action, and Results
Software as Knowledge
Simplicity and Security
How We Figured Out What Sucked
Why Programmers Suck
Developer Hubris
"Consistency" Does Not Mean "Uniformity"
Success Comes from Execution, Not Innovation

ISAR in a Single Line of Code

So, I said that SAR applies to a single line of code, but I didn't give you any examples. So here's a single line of code:

x = y + z

y and z in that line are part of the Structure. They're variables that hold some data. To make an analogy: A jug is a structure that holds water. A variable is a structure that holds data.

The numbers that are stored inside y and z are the Input. That's the data that we're doing something with.

+ is an Action: "Add these two numbers."

= is also an Action: "Store the result in x."

And, of course, the Result is the sum of y and z that gets stored in x. If y is 1 and z is 2, then the Result is the number 3, which gets stored in x. (Also note that x is itself a variable and thus also part of the Structure, but that's getting pretty technical.)