Simple but not remembered

Source: Internet
Author: User

%: If there is a decimal number and it is not an integer multiple, the result may not be as expected. Reason: it is related to the computing precision.

Example: 13.1% 5 gets 3. 0999... 6 instead of 3.1.

6.2% 3.1 get 0, no problem

= Judgment: Data of the value type, which determines whether the value is equal. The reference type determines whether the reference is the same. Java and C # Always judge whether the reference is the same. Nan and any value are not equal, even if it is itself

= Judgment: Based on =, the type judgment is added. True is possible only when the types are identical.

> Judgment: when the operation object on one side of the operator is a value type and the other side is not a value, it is first converted to a value type and then determined. If the conversion fails, the value is always false.

Function: Two declaration Methods: expression declaration, common declaration, function parameter array arguments. callee holds the reference of the current function

Tips for using functions: You can determine which function to call based on parameters.


 VaR  Fun: function;  VaR Sex: String ="  Male  "  ;  If ( "  Male  " = Sex) {fun = Malefunc ;}  Else  {Fun = Femalefunc;} fun (); function malefunc () {trace (  "  Male  " );} Function femalefunc () {trace (  "  Female  "  );} 


Loop: The Goto label is not supported, and the continue and break labels are supported.


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