1.
We write code

2.
Isn't it more about
reading?

3.
Written once – read many
times

4.
„(…) when you program,
you have to think about
how someone will read
your code, not just how a
computer will interpret it.“
Kent Beck

5.
Not about
Architecture

6.
Methods & Code

7.
Extra effort

8.
Save time

9.
Your code base?

10.
It's about joy!

11.
Code is read many more times
than written
Tobias Pfeiffer
@PragTob
pragtob.info

12.
Sources

13.
Crazy?

14.
Are comments a smell?

15.
Outdated comments are the
worst

16.
The why not the what

17.
Comments are an excuse of
the code that it could not be
clearer.

18.
# do one thing
…
…
…
# do another thing
…
…
…
# do something more
…
…

19.
Extract Methods

20.
do_one_thing
do_another_thing
do_something_more

21.
# context, outlet, times, time per
step, state, data
def pattern(c, o, t, l, s, d)
# …
end

22.
Explanatory and meaningful
names

23.
def pattern(context, outlet, time,
time_per_step, state, data)
# …
end

24.
Try to keep it to 2 parameters

25.
Short Methods (<= 8 LOC)

26.
# allowed to drink?
if customer.age > 18
say 'Okay'
prepare_drink requested_drink
say 'here you go'
hand_drink_over drink, customer
else
say 'I am sorry you are not legally
allowed rather to drink here'
say "Would you rather have a
#{NON_ALCOHOLIC_DRINKS.sample}?"
end

27.
if customer.age > 18
say 'Okay'
prepare_drink requested_drink
say 'here you go'
hand_drink_over drink, customer
else
say 'I am sorry you are not legally
allowed rather to drink here'
say "Would you rather have a
#{NON_ALCOHOLIC_DRINKS.sample}?"
end

28.
if customer.age > 18
say 'Okay'
prepare_drink requested_drink
say 'here you go'
hand_drink_over drink, customer
else
say 'I am sorry you are not legally
allowed rather to drink here'
say "Would you rather have a
#{NON_ALCOHOLIC_DRINKS.sample}?"
end

29.
if customer.age > 18
say 'Okay'
prepare_drink requested_drink
say 'here you go'
hand_drink_over drink, customer
else
say 'I am sorry you are not legally
allowed rather to drink here'
say "Would you rather have a
#{NON_ALCOHOLIC_DRINKS.sample}?"
end

30.
if allowed_to_drink_alcohol?(customer)
serve_drink requested_drink,
customer
else
propose_non_alcoholic_drink
end

31.
Nice code formatting

32.
@left
@top
@width
@height
||=
||=
||=
||=
0
0
1.0
0

33.
double character: 'something weird',
stateMask: CTRL | modifier,
KeyCode:
character.downcase.ord

34.
80 character
Width limit

35.
80 character
Width limit

36.
80 character
Width limit

37.
80 character
Width limit

38.
80 character
Width limit

39.
Code bases detoriate

40.
No broken windows

41.
Magical time?

42.
The Boyscout
Rule

43.
TDD

44.
Know when to
break the rules

45.
If you still like your code from
two years ago,
then you are not learning fast
enough.

46.
Enjoy Coding!
Tobias Pfeiffer
@PragTob
pragtob.info

47.
Sources
●
The Pragmatic Programmer
●
Smalltalk Best Practice Patterns
●
Clean Code
●
Practical Object Oriented Design in Ruby

48.
Photo Credit
●
http://officeimg.vo.msecnd.net/en-us/images/MP900439313.jpg
●
http://officeimg.vo.msecnd.net/en-us/images/MC900021328.wmf
●
(CC BY-SA 2.0)
–
http://www.flickr.com/photos/83633410@N07/7658165122/
–
●
http://www.flickr.com/photos/83633410@N07/7658272558/in/photostream/
–
http://en.wikipedia.org/wiki/File:Kent_Beck_no_Workshop_Mapping_XP.jpg
(CC BY-NC-ND 2.0)
–
http://www.flickr.com/photos/jasonlparks/4525188865/
–
●
http://www.flickr.com/photos/12584908@N08/3293117576/
–
●
http://www.flickr.com/photos/andih/86577529/
–
http://www.flickr.com/photos/20714221@N04/2293045156/
http://www.flickr.com/photos/47833351@N02/5488791911/(CC BY-ND 2.0)
(CC BY 2.0)
–
http://www.flickr.com/photos/25165196@N08/7725273678/
–
●
http://www.flickr.com/photos/barry_b/76055201/
–
http://www.flickr.com/photos/29254399@N08/3187186308/
(CC BY-NC-SA 2.0)
–
http://www.flickr.com/photos/antonkovalyov/5795281215/
–
●
http://www.flickr.com/photos/dolescum/7380616658/
–
http://www.flickr.com/photos/doug88888/2792209612/
(CC BY-NC 2.0)
–
http://www.flickr.com/photos/37996583811@N01/5757983532/
–
http://www.flickr.com/photos/sevendead/5650065458/

49.
Source pictures
●
http://imagery.pragprog.com/products/59/tpp.jpg
●
http://www.informit.com/ShowCover.aspx?isbn=9780132852111&type=f
●
http://coding-in.net/blog/wp-content/uploads/clean_code.jpg
●
http://www.informit.com/ShowCover.aspx?isbn=9780321721334&type=f
●
http://mendicantuniversity.org/images/logo.png