scala中{_ =>}和_ = somefunctionname()的含義或用法是什么? [英]What is the meaning or use of { _ => } and _ = somefunctionname() in scala
Scala函數文字中=>(向右雙箭頭)運算符的鏈接是什么意思? [英]What is the meaning of the chaining of => (rightward double arrow) operator in Scala's function literal?