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Scala study notes (1) Abstract: One, variable To obtain the variable value is a time-consuming work can be taken into account when using lazy var. lazy val forLater = someTimeConsumingOperation () Two, function definition "Not only is used to divide the E.
Do not know the Android development of cold knowledge 4 Abstract: 1, we often encounter such a mistake, after the operation of the program compiled TextViewI can not turn into a Button error, which is caused by carelessness. And such an error can not be checked out by the compiler, often to run time to find the error, because the Android program operation takes a long time, so...