8 Kotlin Pop Quizzes

This is a lightning talk at Kotlin Summer LT Matsuri 2017.

In this talk, I am giving 8 quizzes about Kotlin to be answered in 5 minutes respectively without your computer :-)

http://jetbrains.github.io/kotlin-spec

Links:
[Quiz 1]
- https://kotlinlang.org/docs/reference/functions.html#single-expression-functions

[Quiz 2]
- https://kotlinlang.org/docs/reference/inline-functions.html#non-local-returns

[Quiz 3]
- http://jetbrains.github.io/kotlin-spec/#_identifiers
- http://jetbrains.github.io/kotlin-spec/#_decimal_literals

[Quiz 4]
- http://jetbrains.github.io/kotlin-spec/#_singleton_objects

[Quiz 5]
- http://jetbrains.github.io/kotlin-spec/#_primitive_and_special_types

[Quiz 6]
- http://qiita.com/omochimetaru/items/9560baa5b465f5f8483e

[Quiz 7]
- https://stackoverflow.com/a/45144516/5707043

[Quiz 8]
- https://youtrack.jetbrains.com/issue/KT-18938

Transcript

1. 8 Kotlin Pop Quizzes 
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5. 5 Quiz 1. fun sum(a: Int, b: Int) = a + b println(sum(1, 1)) 'VODUJPOKBWBMBOH*OUFHFS
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6. 6 Quiz 1. fun sum(a: Int, b: Int) = a + b println(sum(1, 1)) 
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7. 7 Quiz 2. (1..5).forEach({ i -> if (i > 3) return println(i) }) println("Done") 
   
   
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8. 8 Quiz 2. (1..5).forEach({ i -> if (i > 3) return println(i) }) println("Done") 
   
   
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9. 9 Quiz 3. val ___ = 010 println(val) 
   
   
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10. val ___ = 010 println(val) 10 Quiz 3. &SSPS
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11. 11 Quiz 4. open class A(val x: Any?) object B : A(C) object C : A(B) println(B.x) println(C.x) 
    
    
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12. 12 Quiz 4. open class A(val x: Any?) object B : A(C) object C : A(B) println(B.x) println(C.x) $!GFG
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13. 13 Quiz 5. println(Unit is Unit) println(null is Any) println(null!! is Nothing) 
    
    
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14. 14 Quiz 5. USVF
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15. 15 Quiz 6. class A { init { f() .} val a = "a" fun f() { println(a) } } A() 
    
    
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19. 19 Quiz 7. println(127 as Int? === 127 as Int?) println(128 as Int? === 128 as Int?) 
    
    
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20. 20 Quiz 7. println(127 as Int? === 127 as Int?) println(128 as Int? === 128 as Int?) USVF
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21. 21 Quiz 8. println(2.5 in 1..3) println(3.5 in 1..3) 
    
    
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22. 22 Quiz 8. println(2.5 in 1..3) println(3.5 in 1..3) USVF
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23. 23 Thanks *G
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