Groovy操纵集合秘籍

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def list = [1, 2, 3, 4]
for (int i = 0; i < list.size(); i++) {
System.out.println(list.get(i));
}

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def list = [1, 2, 3, 4]
list.each{
println it
}

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def list = [1, 2, 3, 4]
def result = []
list.each{ result << it*2 }

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def list = [1, 2, 3, 4]
def result = list.collect{it*2}

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def list = [1, 2, 3, 4]
def result = []
list.each{
if(it>2) {
result << it
}
}
println result

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def list = [1, 2, 3, 4]
def result = list.grep{ it > 2 }
println result

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def list = [1, 2, 3, 4]
boolean isMoreThanZero = true;
for(int i in list) {
if(i<=0) {
isMoreThanZero = false;
break;
}
}
println isMoreThanZero

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def list = [1, 2, 3, 4]
def isMoreThanZero = list.every{ it>0 }
println isMoreThanZero

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def list = [1, 2, 3, 4]
def count = 10
list.each{ count+=it }
println count

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def list = [1, 2, 3, 4]
def count = list.inject(10){result,it->
result=result+it
};
println count

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def list = [1, 2, 3, 4]
def result = ''
list.each{ result+=it }
println result

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def list = [1, 2, 3, 4]
def result = list.join()
println result

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def list4 = [1, 1, 1]
def list5 = [2, 2]
assert [[1, 2], [1, 2]] == [list4, list5].transpose()