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Dave Thomas

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June 2008

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19 posts
Dave Thomas's Blog

Premature optimisation in my Rails session code?

For years and years, I've been writing

def current_user
@current_user ||= (session[:user_id] && User.find_by_id(session[:user_id]))
end

The idea was to look up and store the current user object in an instance variable the frst time the method was called, and then use the value in that variable for subsequent calls in the same request.

But now I'm thinking I'll just write this:

def current_u...

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Dave Thomas's Books

Average rating: 3.92 · 1,711 ratings · 133 reviews · 45 distinct works · Similar authors

	Programming Ruby: The Pragmatic Programmers' Guide by Dave Thomas (Goodreads Author), Chad Fowler, Andy Hunt 4.03 of 5 stars 4.03 avg rating — 731 ratings — published 2000 — 6 editions	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Agile Web Development with Rails: A Pragmatic Guide by Dave Thomas (Goodreads Author), David Heinemeier Hansson, Leon Breedt 3.91 of 5 stars 3.91 avg rating — 846 ratings — published 2005 — 8 editions	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Pragmatic Version Control Using CVS by Dave Thomas (Goodreads Author), Andy Hunt 3.24 of 5 stars 3.24 avg rating — 21 ratings — published 2003 — 2 editions	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Well Done!: The Common Guy's Guide to Everyday Success by Dave Thomas (Goodreads Author), Ron Beyma 3.0 of 5 stars 3.00 avg rating — 5 ratings — published 1994 — 2 editions	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	The Pragmatic Programmer: From Journeyman to Master by Andrew Hunt, David Thomas 4.32 of 5 stars 4.32 avg rating — 3,266 ratings — published 1999 — 7 editions	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Ruby On Rails by Dave Thomas (Goodreads Author), DAVID HEINEMEIR HANSS (Contributor) 3.5 of 5 stars 3.50 avg rating — 4 ratings — 2 editions	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Simple Minds: Glittering Prize 3.5 of 5 stars 3.50 avg rating — 4 ratings — published 1985	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	U2: Stories For Boys 3.0 of 5 stars 3.00 avg rating — 4 ratings	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Daves Way 12c Floor D 5.0 of 5 stars 5.00 avg rating — 1 rating	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Higher Than the Top Dfl by Dave Thomas (Goodreads Author), Sam Walton, Wally Amos 5.0 of 5 stars 5.00 avg rating — 1 rating — published 1993	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars

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Dave Thomas wrote a new blog post Premature optimisation in my Rails session code? For years and years, I've been writing def current_user @current_user \|\|= (session[:user_id] && User.find_by_id(session[:user_id]))end The id... Read more of this blog post »
Jul 18, 2012 04:15pm · 1 like · like
Dave Thomas rated a book 5 of 5 stars The Wind-Up Bird Chronicle by Haruki Murakami	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
Feb 11, 2012 01:17pm
Dave Thomas rated a book 5 of 5 stars The Magus by John Fowles	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
Feb 11, 2012 01:16pm
Dave Thomas rated a book 4 of 5 stars Aloha from Hell (Sandman Slim, #3) by Richard Kadrey	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
Feb 11, 2012 01:15pm
Dave Thomas rated a book 4 of 5 stars Kill the Dead (Sandman Slim, #2) by Richard Kadrey	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
Feb 11, 2012 01:15pm
Dave Thomas rated a book 5 of 5 stars Sandman Slim (Sandman Slim, #1) by Richard Kadrey	Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
Feb 11, 2012 01:15pm