I have an attribute (32 bits-long), that each bit responsible to specific functionality. Perl script I'm writing should turn on 4th bit, but save previous definitions of other bits.

I use in my program: 
 
Sub BitOperationOnAttr{
my $a="";

MyGetFunc( $a);
$a |= 0x00000008;
MySetFunc( $a);
}

[download]

** MyGetFunc/ MySetFunc my own fuctions that know read/fix value.

Questions:

1. if usage of $a |= 0x00000008; is right ?

2. how extract hex value by Regular Expression from string I have : For example:

"Attribute: Somestring: value (8 long (0x8))"

Thanks in advance

In reply to Bit operation by toren

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