When a closure "captures" a variable it "lifts" the variable out of its local scope and effectively moves it into an anonymous object.
当一个闭包“捕获”一个变量时,它就会将这个变量提取出它的本地范围,移到一个匿名对象里。
A transient variable enables the application to keep a copy in local memory, but rebuilds the object if using the backup copy.
临时变量允许应用程序在本地内存中保留副本,但可以在使用备份副本的情况下重新构建对象。
To fetch elements from the collection, you had to know the type of object in the collection so you could cast it back to the appropriate local variable.
要从集合中提取元素,您必须知道集合中对象的类型,以将其强制转换为合适的局部变量。
应用推荐