Groovy Puzzlers

GroovyPuzzlers

// https://www.youtube.com/watch?v=k6vXQwxk7N8

//***
-3.abs()
// A. 3
// B. NoSuchMethodError
// C. -3
// D. Execution Failure

//***
println (-3).abs()
// A. print -3
// B. print 3
// C. print 3 and NullPointerException
// D. print -3 and NullPointerException

//***
def range = 1.0..10.0
assert range.contains(5.0)
println range.contains(5.6)
// A. Assertion Failed
// B. print false
// C. print true
// D. NullPointerException

//***
def key = 'x'
def map = [key: 'treasure']
def value = map.get(key)
println value
// A. NoSuchElementException
// B. print null
// C. print treasure
// D. Execution Failure

//***
def map = [2: 'treasure']
def key = 2
def value = map."$key"
println value
// A. NoSuchElementException
// B. print null
// C. print treasure
// D. Execution Failure

//***
List<Integer> list = [1, 2, 3]
def now = new Date()
list << now
println list
// A. Compile Failure
// B. [1, 2, 3, Mon Jul 28 11:19:11 CDT 2014]
// C. [1, 2, 3, 1406564351463]
// D. ClassCastException


//***
[0..9].each { println(it - 1) }
// A. -1 | B. 0 | C. [0,2,3,4,5,6,7,8,9]    |
//    0  |    1 |                           |
//    1  |    2 |                           |
//    2  |    3 | D. [-1,0,1,2,3,4,5,6,7,8] |
//    3  |    4 |                           |
//    4  |    5 |                           |
//    5  |    6 |                           |
//    6  |    7 |                           |
//    7  |    8 |                           |
//    8  |    9 |                           |

//*** double the PI
double value = 3
println "$value.14".isDouble()
// A. true
// B. MissingPropertyException
// C. false
// D. MissingMethodException

//***
class Invite {
    int attending = 1
}

def invite = new Invite()
def attendees = (invite.attending) + 1
println attendees
// A. Compile Failure
// B. 1
// C. 2
// D. MissingPropertyException


//***
// All problems in computer science can be solved by another pair of parentheses (John McCarthy, the inventor of LISP))