result

Any variable.

expression

Any expression.

Using this operator is exactly the same as specifying:

 	Copy Code
result = result | expression

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

 	Copy Code
0101 (result) 1100 (expression) ---- 1101 (output)

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

Version 1

Reference

Concepts