EuroPython Lightning talk, 2010

1. The easiest quiz in the world
ever
Jonathan Fine, Open University, UK
EuroPython Lightning talk, 2010
Source for slides available at http://bitbucket.org/jfine
/javascript-for-python-programmers
.../tex/easiest-quiz-ever.tex

2. Question 1: Panama hats
Q: In which country were Panama hats originally made?

3. Question 1: Panama hats
Q: In which country were Panama hats originally made?
A: Ecuador.
Panama was a city in Ecuador before the creation of the Panama
Canal Zone and then the country Panama.

4. Question 2: Equality is transitive
Command line SpiderMonkey JavaScript interpreter:
easiest-quiz-ever$ js
js> a = ’0’
js> b = 0
js> c = ’’
js> a == b
true
js> b == c
true
js> a == c // Question.

5. Question 2: Equality is transitive
Command line SpiderMonkey JavaScript interpreter:
easiest-quiz-ever$ js
js> a = ’0’
js> b = 0
js> c = ’’
js> a == b
true
js> b == c
true
js> a == c // Question.
js> a == c
false

6. Question 3: Canary Islands
Q: After which creature were the Canary Islands named?

7. Question 3: Canary Islands
Q: After which creature were the Canary Islands named?
A: Dog (canine).
As I recall, there were many dog seals on one of the Canary Islands.

8. Question 4: Assignment assigns
js> words = ’Call me Ishmael.’
Call me Ishmael.
js> words.lang = ’en’
js> lang = words.lang // What is lang?

9. Question 4: Assignment assigns
js> words = ’Call me Ishmael.’
Call me Ishmael.
js> words.lang = ’en’
js> lang = words.lang // What is lang?
js> lang == undefined
true

10. Question 4: Assignment assigns
js> words = ’Call me Ishmael.’
Call me Ishmael.
js> words.lang = ’en’
js> lang = words.lang // What is lang?
js> lang == undefined
true
js> lang = words.lang = ’en’ // What is lang?

11. Question 4: Assignment assigns
js> words = ’Call me Ishmael.’
Call me Ishmael.
js> words.lang = ’en’
js> lang = words.lang // What is lang?
js> lang == undefined
true
js> lang = words.lang = ’en’ // What is lang?
js> lang
en

12. Question 5: King George
Q: What was the first name of Britain’s King George VI?

13. Question 5: King George
Q: What was the first name of Britain’s King George VI?
A: Albert.
He had several names, and Queen Victoria said she wanted her
beloved Albert to be the only English monarch of that name.

14. Question 6: Dot binds
js> a = [0, 1, 2]
0,1,2
js> a.push(3); a.push(4);
js> a
0,1,2,3,4

15. Question 6: Dot binds
js> a = [0, 1, 2]
0,1,2
js> a.push(3); a.push(4);
js> a
0,1,2,3,4
js> b = [0, 1, 2]
js> tmp = b.push
js> tmp(3); tmp(4); // What is ’b’?

16. Question 6: Dot binds
js> a = [0, 1, 2]
0,1,2
js> a.push(3); a.push(4);
js> a
0,1,2,3,4
js> b = [0, 1, 2]
js> tmp = b.push
js> tmp(3); tmp(4); // What is ’b’?
js> b
0,1,2

17. Question 6: Dot binds
js> a = [0, 1, 2]
0,1,2
js> a.push(3); a.push(4);
js> a
0,1,2,3,4
js> b = [0, 1, 2]
js> tmp = b.push
js> tmp(3); tmp(4); // What is ’b’?
js> b
0,1,2
js> [length, this[0], this[1]]
2,3,4

18. Question 7: White rhinocerous
Q: What is the colour of a white rhinocerous?

19. Question 7: White rhinocerous
Q: What is the colour of a white rhinocerous?
A: Grey.
The name is a corruption of the Dutch work for ‘wide’.

20. Question 8: False is false
js> true ? 1 : 0
1
js> false ? 1 : 0
0

21. Question 8: False is false
js> true ? 1 : 0
1
js> false ? 1 : 0
0
js> new Boolean(false) ? 1 : 0 // Question

22. Question 8: False is false
js> true ? 1 : 0
1
js> false ? 1 : 0
0
js> new Boolean(false) ? 1 : 0 // Question
1

23. Question 8: False is false
js> true ? 1 : 0
1
js> false ? 1 : 0
0
js> new Boolean(false) ? 1 : 0 // Question
1
js> Boolean(false) ? 1 : 0

24. Question 8: False is false
js> true ? 1 : 0
1
js> false ? 1 : 0
0
js> new Boolean(false) ? 1 : 0 // Question
1
js> Boolean(false) ? 1 : 0
0

25. Question 9: Black box
Q: What colour is the black box flight recorder carried by
commercial planes?

26. Question 9: Black box
Q: What colour is the black box flight recorder carried by
commercial planes?
A: Orange.
This makes it more visible.

27. Question 10: Like JavaScript
Q: JavaScript is not like which programming language . . .

28. Question 10: Like JavaScript
Q: JavaScript is not like which programming language . . .
. . . created by Sun?

29. Question 10: Like JavaScript
Q: JavaScript is not like which programming language . . .
. . . created by Sun?
A: Java.

30. Thank you