bit-manipulation Archives

var attr = ~'input,textarea'.indexOf( target.tagName.toLowerCase() ) ? 'value' : 'innerHTML' I saw it in an answer, and I’ve never seen it before. What ...

May 27, 2022
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Using bitwise OR 0 to floor a number

A colleague of mine stumbled upon a method to floor float numbers using a bitwise or: var a = 13.6 | 0; //a ...

May 26, 2022
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Rounding up to next power of 2

I want to write a function that returns the nearest next power of 2 number. For example if my input is 789, the ...

May 22, 2022
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What is Bit Masking?

I am fairly new to C programming, and I encountered bit masking. Can someone explain to me the general concept and function of ...

May 21, 2022
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Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C

What is the most efficient algorithm to achieve the following: 0010 0000 => 0000 0100 The conversion is from MSB->LSB to LSB->MSB. All ...

May 21, 2022
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Extracting bits with a single multiplication

I saw an interesting technique used in an answer to another question, and would like to understand it a little better. We’re given ...

May 15, 2022
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What is “2’s Complement”?

I’m in a computer systems course and have been struggling, in part, with Two’s Complement. I want to understand it but everything I’ve ...

May 4, 2022
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