[英]Is there similar functionality in Python REPL to Scala's REPL to reference a previous computation?
[英]How to use previous expression's result in Scala REPL?
// when in Scala REPL
scala> 1
res0: Int = 1
如何在另一個表達式中重用一個表達式的結果?
例如:
scala> 1
res0: Int = 1
scala> the_previous_expression + 1
// = 2
您可以通過在下一行查看其REPL輸出(以res開頭的單詞)來重用前一個表達式的結果。
// when in Scala REPL
scala> 1
res0: Int = 1 // <-- res0 is the handle that you can use
例如:
scala> 1
res0: Int = 1
scala> res0 + 1
res1: Int = 2
scala> res1 + 1
res2: Int = 3
// and so on
您還可以將其與其他人一起使用:
scala> () => "hey!" // anonymous function
res0: () => String = $$Lambda$1104/1658578510@6cff61fc
scala> res0()
res1: String = hey
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