共用方式為

Bitwise AND Assignment Operator (&=) (Windows Scripting - JScript)

  • 發行項

 

Performs a bitwise AND on the value of a variable and the value of an expression and assigns the result to the variable.

Syntax

result &= expression

Arguments

  • result
    Any variable.

  • expression
    Any expression.

Remarks

Using this operator is exactly the same as specifying:

result = result & expression

The &= operator looks at the binary representation of the values of result and expression and does a bitwise AND operation on them. The output of this operation behaves like this:

0101    (result)
1100    (expression)
----
0100    (output)

Any time both of the expressions have a 1 in a digit, the result has a 1 in that digit. Otherwise, the result has a 0 in that digit.

Requirements

Version 1

See Also

Bitwise AND Operator (&) (Windows Scripting - JScript)
Operator Precedence (Windows Scripting - JScript)
Operator Summary (Windows Scripting - JScript)