How Not Writing PHP Makes You Better At PHP

Given at PHP Benelux 2015

1. HOW NOT WRITING PHP CAN MAKE YOU BETTER AT PHP
2. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM @dcousineau
3. @croscon
5. HOW NOT WRITING PHP CAN MAKE YOU BETTER AT PHP
6. HOW TO LIFEHACK YOUR WAY INTO LEARNING PROGRAMMING
7. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM Don’t do more work than you have to My middle school swim coach
8. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM PROGRAMMING LANGUAGES
9. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM TURING COMPLETE
12. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM any real-world computation can be translated into an equivalent computation involving a Turing machine. CHURCH-TURING THESIS
13. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM
14. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM Turing Complete
15. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM THE LANGUAGE IS A MEANS TO AN END A WAY TO EXPRESS ABSTRACT THOUGHT
16. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM THE LANGUAGE IS A MEANS TO AN END A WAY TO EXPRESS ABSTRACT THOUGHT ALGORITHMS
17. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM EXPLANATION
18. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM In the beginning, there was Assembly
19. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM …and it was not good
20. main: li $a0, 1 li $a1, 2 li $t0, 3 jal addthem add $t0, $t0, $v0 syscall addthem: addi $sp, $sp, -4 sw $ra, 0($sp) add $v0, $a0, $a1 lw $ra, 0($sp) addi $sp, $sp, 4 jr $ra
21. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM And then there was C
22. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM int main() { int t0 = 3; int v0 = addthem(1, 2); return v0 + t0; } int addthem(int a0, int a1){ int t0 = a0 + a1; return t0; }
23. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM CONSTRUCT FUNCTION WHAT’S YOUR … FUNCTION
24. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM function recurse() { recurse(); } recurse(); RangeError: Maximum call stack size exceeded.
25. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM REPETITION=LEARNING
26. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM http://bit.ly/bk-js Linguistic Relativity in Programming Langauges
27. + DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM SAPIR-WHORF HYPOTHESIS The languages you speak determine the way you think
28. + DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM SAPIR-WHORF HYPOTHESIS The languages you speak influence the way you think
29. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM Culture Language thought
30. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM Culture Language thought
31. + DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM BLUB PARADOX “Some programming languages are more powerful than others… I look at [Python, Java, C and Perl]. How can you get anything done in them, I think, without macros?” Paul Graham http://www.paulgraham.com/avg.html
32. + DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM BLUB PARADOX “They're satisfied with whatever language they happen to use, because it dictates the way they think about programs.” Paul Graham http://www.paulgraham.com/avg.html
33. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM IDIOMS
34. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM Combination of words in common use that have a figurative, and sometimes literal, meaning
35. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM In this case, it was routed straight to the Director of Central Intelligence and, because it evidently discussed the identity of a field spook, to the Deputy Director (Operations), since all the field spooks worked for her. The former was a busier person than the latter, but that didn’t matter, since the latter was married to the former Tom Clancy, Rainbow Six
36. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM What beliefs or what wrong could motivate a man to do murder on a large scale? In the former case, Brightling was not a religious fanatic. In the latter, he had no overt dissatisfaction with his country. Tom Clancy, Rainbow Six
37. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM His last through before closing his eyes on this sunny morning was that he hoped the contact number hadn’t been changed, or compromised. If the latter, then he’d have to do some explaining to the local police… Tom Clancy, Rainbow Six
38. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM Yes, this could and would work. The only question was daylight or nighttime. The latter was the usual answer, but he’d learned the hard way that counter-terror teams loved the night… Tom Clancy, Rainbow Six
39. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM “Language and economics.” The former had proven very useful. The latter had been totally valueless, since the Marxist idea of economics had not exactly proven to be an effective one. Tom Clancy, Rainbow Six
40. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM Means of expressing a recurring construct or abstract idea, often across multiple languages
41. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM i = 0 for line in text.split("\n"): print "#{0} {1}".format(i, line) i += 1
42. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM for i, line in enumerate(text.split("\n")): print "#{0} {1}".format(i, line)
43. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM def my_enumerate(iterable): i = 0 for item in iterable: yield i, item i += 1 for i, line in my_enumerate(text.split("\n")): print "#{0} {1}".format(i, line)
46. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM function enumerate($iterable) { $i = 0; foreach ($iterable as $item) { yield [$i, $item]; $i++; } } foreach (enumerate(explode("\n", $text)) as list($i, $line)) { print "#$i $line\n"; }
47. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM DECISIONS ARE LIKE WATER
48. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM (defn manhattan-distance [piece board] "Find the manhattan distance between a piece and its goal" (let [pos (locate piece board) goal-pos (locate piece *goal-state*)] (abs (+ (- (floor (/ pos 3)) (floor (/ goal-pos 3))) (- (mod pos 3) (mod goal-pos 3)))))) (defn manhattan-distance-sum [board] "Find the sum of the manhattan distances" (reduce + (map #(manhattan-distance % board) board)))
49. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM var sortedDict = _(someDict).chain() .map(function(v, k) { return [k,v]; }) .sortBy(function(a) { return a[0]; }) .reduce(function(s, v) { s[v[0]] = v[1]; return s; }, {}) .value();
50. DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM PHP MADE ME BETTER
51. + DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM THE TAKEAWAY Other languages make certain ABSTRACT concepts easier to learn By making it easier to use said concept than not use it in a way that your current language does not
52. THANKS. FOR YOUR ATTENTION DANIEL COUSINEAU // FOLLOW ME : @DCOUSINEAU OR HTTP://DCOUSINEAU.COM