alvin alexander

scala cookbook

Authors love to hear “thanks”

By Alvin Alexander. Last updated: August 29 2018

I doubt that most people know it, but authors always enjoy receiving letters of “thanks” like this one. Writing is often a lonely, solitary business, and to hear that your work has helped other people is always satisfying. If there’s a book you’ve read that you really enjoyed, I encourage you to write the author a brief letter of thanks. They’ll appreciate it more than you’ll know.

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A note from reviewing the Scala Cookbook

By Alvin Alexander. Last updated: June 24 2018

I'm sitting at Panera Bread, reviewing the first two chapters of the Scala Cookbook. Chapter 1 sucks, someone’s gonna have to do something about that. Chapter 2 isn’t too bad.

A note from June 24, 2012

A lesson learned from writing the Scala Cookbook

By Alvin Alexander. Last updated: April 30 2018

A lesson learned from writing the Scala Cookbook: It’s fun and interesting to work with some professional writers in the editing process, and it’s great to get their feedback. But you also have to be willing to duke it out to keep what’s important. It’s your baby, it’s your name on the front cover.

How to use partially applied functions in Scala

By Alvin Alexander. Last updated: March 7 2018

Problem: You want to eliminate repetitively passing variables into a Scala function by (a) passing common variables into the function to (b) create a new function that’s pre-loaded with those values, and then (c) use the new function, passing it only the unique variables it needs.

Solution: The classic example of a partially applied function begins with a simple sum function:

How to define Scala methods that take complex functions as parameters (syntax)

By Alvin Alexander. Last updated: March 7 2018

Problem: You want to define a Scala method that takes a function as a parameter, and that function may have one or more input parameters, and may also return a value.

Solution: Following the approach described in the previous recipe, define a method that takes a function as a parameter. Specify the function signature you expect to receive, and then execute that function inside the body of the method.

A recommendation for would-be book writers

By Alvin Alexander. Last updated: December 29 2017

If you’ve read any of my books (like the Scala Cookbook or Functional Programming, Simplified), and thought, “Hey, I can write a book,” I encourage you to do so. One book that has been helpful in my writing career is William Zinsser’s On Writing Well: The Classic Guide to Writing Nonfiction. If you’re seriously thinking about writing a book about programming or any other technical topic, it’s a good read.

On deleting a chapter from the Scala Cookbook

By Alvin Alexander. Last updated: October 13 2017

In an effort to “Get rid of the crap,” I asked my editor if we could delete an entire chapter from the Scala Cookbook, and she said yes. I didn’t know if they’d allow that since the advance they paid me is based on a proposal of X chapters, but they’re all-in on just trying to create a good book, which is nice.

(a note from october 13, 2012)

This is a page from my book, “A Survival Guide for New Consultants”

More information

As I finish editing this book in January, 2014, it’s a busy time. In addition to releasing this book, I just finished writing a 700+ page computer programming book for O’Reilly named Scala Cookbook.

A funny thing about the Scala Cookbook: I wrote it on a whim, as a dare, wondering, “Am I good enough to write this book, on my own?” I doubted myself for a little while, but then overcame my fears and sent an email to the people at O’Reilly. As I’ve said throughout this book, all you are is attitude.

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