Scala:忽略 Future 返回值，但将它们链接起来

Question

当我不关心返回值时，我应该如何编写代码。

例子:

for {
    a <- getA // I do not care about a, but I need to wait for the future to finish
    b <- getB
} yield (b)

Answer 1

像这样

for {
     _ <- getA 
     b <- getB
} yield (b)