Understanding bitwise operations in javascript

Question

I am currently storing data inside an XML doc as binary, 20 digits long, each representing a boolean value.

Answer 1

Assuming you have no more than 32 bits, you can use JavaScript's built-in parseInt() function to convert your string of 1s and 0s into an integer, and then test the flags using the & (and) operator:

var flags = parseInt("10001010100011110000", 2); // base 2

if ( flags & 0x1 )
{
   // do something
}

...

See also: How to check my byte flag?

(question is on the use in C, but applies to the same operators in JS as well)