I want to truncate a number in javascript, that means to cut away the decimal part开发者_StackOverflow社区:
The exercise is: Write a function setbits(x,p,n,y) that returns x with the n bits that begin at position p set to the rightmost n bits of y, leaving the other bits unchanged.
Is it possible to write logic using onl开发者_开发问答y the AND, OR, and NOT operators to compare 2 operands and return true/false (-1, 0) without the use of jumps?
I have been using a bitwise comparison to check if entities and maptiles have flags in a roguelike game, but I\'ve run into a problem - I need to check in an if() if a tile/ent doesn\'t have a flag, b
I want a one line code to check whether a given integer is of form 2i - 2开发者_StackOverflow社区j or NOT. (using bitwise operators)As AndreyT says, the answer can be found in Hacker\'s Delight:
I need a function to generate random integers. (assume Java long type for now, but this will be extended to BigInteger or BitSet later.)
I was just going through some basic stuff as I am learning C. I came upon a question to multiply a number by 7 without using the * operator. Basically it\'s like this
I\'m looking for a very compact way of storing a dense variable length bitarray in Java. Right now, I\'m using BitSet, but it seems to use on average 1.5*n bits of storage space for a bit vector of si
What\'s a fast way to round up an unsigned int to a multiple of 4? A multiple of 4 has the two least significant bits 0, right? So I could mask them out and then do a switch statement, adding either
Updated with newer answer and better test Let\'s say I have the number 382 which is 101111110. How could I randomly turn a bit which is not 0 to 0?
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