Re: Converting a String of bits into a binary number in perl?

["Deepak Mallya" <suppressed>]

 

         the final value should be a binary value(datatype) not a string of binary digits.

        eg:-  if we do $a=0b."100" this becomes a string and when we take the length($a) it gives us the size in bytes of a integer (here it would be 4 bytes)

                but if we do $a=0b100 its a binary value so length($a) gives us the the size in bytes (so length would be 1 byte)

Consider

 $a=0b100;
$b=0b."100";
print length($a)."\n"; #gives 1
print length($b); # gives 4

 

But if we do this 

print length(pack ("b*","100010111")); this gives length 2 as there are 9 bits here ...

 

On 3/6/07, David Nicol <suppressed> wrote:

>  $a="100";  I want to convert this into perl's interpretation of
> binary no ie $a=0b100

# perl -wple 's/\b([01]+)\b/"0b$1"/gee'
100
4
10111101010101
12117
the powers of 2 are 1, 10, 100, 1000, 10000, 100000
the powers of 2 are 1, 2, 4, 8, 16, 32


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"Big discoveries are protected by public incredulity." -- Marshall McLuhan