Groovy高效编程——‘匕首方法’的使用

def list = ['a', 'b', 'c']
list.each { elem ->
println elem
} 

def map = [name:"山风小子", address:"Shanghai"]
map.each { key, value ->
println "$key : $value"
}

def list = ['a', 'b', 'c']
list.eachWithIndex { elem, i ->
println "$i : $elem"
}  

def list = ['a', 'ab', 'abc']
list.any { elem -> 
elem.length() < 3
}

def list = ['a', 'ab', 'abc']
list.every { elem -> 
elem.length() < 3
}

def list = ['a', 'ab', 'abc']
list.grep { elem ->
elem.length() < 3
}

def list = ['a', 'ab', 'abc']
list.grep(~/../)

def list = ['a', 'ab', 'abc']
list.grep(['a', 'cde', 'ab'])

def list = [2007, 8, 26]
list.join('-')

def list = [2007, 8, 26]
list.sort { e1, e2 ->
return e1 - e2
}

def list = [2007, 8, 26]
list.find { elem ->
elem <30
}

def list = [2007, 8, 26]
list.findAll { elem ->
elem < 30
}

def list = ['a', 'b', 'c']
list.collect { elem ->
elem * 2
}

def map = [name:'山风小子', address:'Shanghai']
map.collect { entry ->
"${entry.key} : ${entry.value}"
}

def list = ['a', 'b', 'abc', 'ab', 'c', 'bc']
list.groupBy { elem ->
elem.length()
}

def list = ["love", "you"]
list.inject('I') { sum, elem -> 
"$sum $elem "
}

def list = ['a', 'b', 'c']
list.reverse()

def list = 'abc'
list.reverse()

'a1/b2/c3/d4'.tokenize('/')

def list = ['a', 'b', 'b', 'a', 'c']
list.unique()

def list = [1, 2, 3]
list.max()

def list = ['a', 'ab', 'abc']
list.max { elem ->
elem.length()
}  

def list = ['a', 'ab', 'a']
list.count('a')

def list = "aaba"
list.count('a')

def list = [1, 2, 3]
list.sum()  

def list = ['a', 'b', 'c']
list.sum()