I'm someone who writes code just for fun and haven't really delved into it in either an academic or professional setting, so stuff like these bitwise operators really escapes me.  I was reading an article about JavaScript, which apparently...
I've read 'what are bitwise operators?', so I know what bitwise operators are but I'm still not clear on how one might use them. Can anyone offer any real-world examples of where a bitwise operator would be useful in JavaScript?  Th...
I recently found this piece of JavaScript code:  Math.random() * 0x1000000 << 0   I understood that the first part was just generating a random number between 0 and 0x1000000 (== 16777216).  But the second part seemed odd. What's the poin...
If you read the comments at the jQuery inArray page here, there's an interesting declaration:  !!~jQuery.inArray(elm, arr)    Now, I believe a double-exclamation point will convert the result to type boolean, with the value of true.  What I don...
I have a javascript code:  var c = 267414715; var d = c ^ ("0x81BE16CD");   Result is -1907459466  http://jsfiddle.net/4N3JY/1/  I can't seem to get a PHP equivalent. Have tried the following:  <?php     $c=267414715;  $d=$c ^ hexdec(&...
Suppose we have 1 and this number in base 2 is:  00000000000000000000000000000001   Now I want to flip all bits to get following result:  11111111111111111111111111111110   As far as I know, the solution is to use the ~ (bitwise NOT operator) to flip...
I'm trying to find a way to make PHP Bitwise XOR results match the results of JavaScript Bitwise XOR. I came across different questions of this issue, and all without answers. Here are a few of them:  Javascript & PHP Xor equivalent  php bitw...
I'm doing some bitwise manipulation in a project and I wonder if the built-in typed arrays might save me some headache and maybe even give me a bit of a performance gain.  let bytes = [128, 129, 130, 131] let uint32 = (bytes[0] << 24) | (by...
I want to truncate a number in javascript, that means to cut away the decimal part:  trunc ( 2.6 ) == 2  trunc (-2.6 ) == -2    After heavy benchmarking my answer is:   function trunc (n) {     return ~~n;  }   // or     function trunc1 (n) {    ...

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