幾乎每個人都給多么，怎樣讓我直接展示一下它的演變過程：
可以使用Array的實例方法：
// general form of closureimages.sortInPlace({ (image1: imageFile, image2: imageFile) -> Bool in return image1.fileID > image2.fileID })
// types of closure's parameters and return value can be inferred by Swift, so they are omitted along with the return arrow (->)
images.sortInPlace({ image1, image2 in return image1.fileID > image2.fileID })// Single-expression closures can implicitly return the result
of their single expression by omitting the "return" keywordimages.sortInPlace({ image1, image2 in image1.fileID > image2.fileID })
// closure's argument list along with "in" keyword can be omitted, $0, $1, $2, and so on are used to refer the closure's first, second,
third arguments and so onimages.sortInPlace({ $0.fileID > $1.fileID })// the simplification of the closure is the sameimages = images.sort
({ (image1: imageFile, image2: imageFile) -> Bool in return image1.fileID > image2.fileID })images = images.sort({ image1, image2 in return
image1.fileID > image2.fileID })images = images.sort({ image1, image2 in image1.fileID > image2.fileID })images = images.sort({ $0.fileID >
$1.fileID })有關排序工作原理的詳細說明，請參閱排序函數.
