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...
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 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) {    ...
Consider this condition:  (true & true & false & false & true) == true //returns: false   As you can see, the bitwise AND behavior is exactly like logical AND's:  (true && true && false && false &&...
I can't get the & operator to work in an Angular ng-if expression (to use with some bit flags). Suppose we have some HTML like this:  <div ng-if="value & 2"> </div>   If value equals 3, then the bitwise operation shoul...
I've been given the task of porting Java's Java.util.Random() to JavaScript, and I've run across a huge performance hit/inaccuracy using bitwise operators in Javascript on sufficiently large numbers. Some cursory research states that "...
I am trying to do bitwise AND operation on long numbers in Javascript.   I have tried both the solution given at (How to do bitwise AND in javascript on variables that are longer than 32 bit?) but none of it was accurate with the numbers I am working...
When I perform a 24 bit-shift for a number less than 256 I get a negative result? Why is that?    console.log( (200<<23)>>23 );  console.log( (200<<24)>>24 ); // ???...
Quick and dirty question. I get the sense that I'm missing some fundamental knowledge for bitwise manipulation on some seemingly simple things.  The problem I'm trying to solve is as follows:      I have an enumeration of integers between 1 a...
In a recent project, it involved performing an "or" operation to 2 64 bit bit-strings, but I faced a problem, if the strings were sufficiently large, any bitwise operation would return 0, for example: (this following example may not be a 64 b...

Tags

Recent Questions

Top Questions

Home Tags Terms of Service Privacy Policy DMCA Contact Us

©2020 All rights reserved.