Groovy , what does -> mean
In examples of groovy code I find the ->
operator everywhere, but the groovy tutorials nor the book I have seem to provid开发者_StackOverflow中文版e any explaination as to what this means.
It is used to separate where you declare bindings for your closure from the actual code, eg:
def myClosure = { x, y -> x + y }
the part before ->
declares that the closure has two arguments named x
and y
while the second part is the code of the closure.
You can omit it in closures with just one parameter, in that case the it
variable is assumed:
[1, 2, 3, 4].each{ println it*2 }
but you could also do
[1, 2, 3, 4].each{ lol -> println lol*2 }
精彩评论