Groovy 集合

collect = ['groovy', 29, 'Hello', 'Groovy']
empty=[]
assert empty.size() == 0
//添加元素
empty.add 1
assert empty.size() == 2    

collect = [5, 9, 2, 2, 4, 5, 6] 
println collect.join(' - ')  // prints 5 - 9 - 2 - 2 - 4 - 5 - 6
println collect.count(2)     // prints 2
println collect.sort()       // prints [2, 2, 4, 5, 5, 6, 9]   

myMap = ["name" : "Groovy", "date" : new Date()]
println myMap["date"]
println myMap.date   

map = ["name":"Gromit", "likes":"cheese", "id":1234]
assert map.name == "Gromit"
assert map.id == 1234
//Create an empty maps
emptyMap = [:]
assert emptyMap.size() == 0
emptyMap.foo = 5 
assert emptyMap.size() == 1
assert emptyMap.foo == 5
emptyMap.put("bar",6)
assert emptyMap.get("bar") == 6
players = ['baseball':'Albert Pujols', 'golf':'Tiger Woods']
println players['golf'] // prints Tiger Woods
println players.golf // prints Tiger Woods
for (player in players)
{
println "${player.value} plays ${player.key}"
}
// This has the same result as the previous loop.
players.each {
player |println "${player.value} plays ${player.key}"
}
  

myRange = 29..<32
myInclusiveRange = 2..5
println myRange.size() // prints 3
println myRange[0]   // prints 29
println myRange.contains(32) //prints false
println myInclusiveRange.contains(5) //prints true
// an inclusive range and operations
range = 'a'..'d'
assert range.size() == 4
assert range.get(2) == 'c'
assert range instanceof java.util.List
assert range.contains('a')
assert range.contains('d')
assert ! range.contains('e')

class IteratorExample1{
static void main(args) {
coll = ["JMS", "EJB", "JMX"]
coll.each{ item | println item }
}
}

collec = [1, 2, 3, 4, 5]
collec << 6 //appended 6 to collec

acol = ['a','b','c'] * 3 //acol now has 9 elements
coll = [10, 11]
coll2 = [12, 13]
coll3 = coll + coll2 //10,11,12,13
difCol = [1,2,3] - [1,2] //difCol is 3
assert [1, 2, 3] == [1, 2, 3] //true

text = "nice cheese gromit!"
x = text[2]
assert x == "c"
assert x.class == String

sub = text[5..10]
assert sub == 'cheese'

map = ["name":"Gromit", "likes":"cheese", "id":1234]
assert map['name'] == "Gromit"

list = [10, 11, 12]
answer = list[2]
assert answer == 12
list = 100..200
sub = list[1, 3, 20..25, 33]
assert sub == [101, 103, 120, 121, 122, 123, 124, 125, 133]

list = ["a", "b", "c"]
list[2] = "d"
list[0] = list[1]
list[3] = 5
assert list == ["b", "b", "d", 5

text = "nice cheese gromit!"
x = text[-1]
assert x == "!"
name = text[-7..-2]
assert name == "gromit"

text = "nice cheese gromit!"
name = text[3..1]
assert name == "eci"