callback，java
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callback，js
1、js中callback簡介：一個被當做引數的函式，即為回撥函式。在JS中萬物皆為物件。函式本身也是一個物件，既然是物件，所以函式當然可以當做函式的引數。//可以這樣建立函式letfun=newFunction("arg1","arg2","returnarg1*ar...