warning

一般情况下,我们会倾向于打开各种warning,以便规范我们的代码.不过,scala有时候有些warning也是蛮扯的.比如这么一段

$ scala -Xlint:missing-interpolator
Welcome to Scala version 2.11.7 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_05).
Type in expressions to have them evaluated.
Type :help for more information.

scala> val key="value"; println("$key")
<console>:12: warning: possible missing interpolator: detected interpolated identifier `$key`
        println("$key")
                ^
$key
key: String = value

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