bitwise-and - McMap

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I am trying to do assignment: "Find the number of bits in an unsigned integer data type without using the sizeof() function." And my design is to convert the integer to bits and then to count them...

c++bit-manipulation bitwise-operators bit-shift bitwise-and

Doggy asked 12/8, 2016 at 16:25

3

Solved

What does the bitwise code "$n & ($n - 1)" do?

What does this code mean and what are other ways accomplish the same without using bit shifting? if ($n & ($n - 1))

php bit-manipulation bitwise-and

Lottielotto asked 11/10, 2009 at 19:16

4

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How do I use Java's bitwise operators in Kotlin?

Java has binary-or | and binary-and & operators: int a = 5 | 10; int b = 5 & 10; They do not seem to work in Kotlin: val a = 5 | 10; val b = 5 & 10; How do I use Java's bitwise op...

java kotlin bitwise-operators bitwise-and bitwise-or

Vexation asked 27/1, 2018 at 9:45

4

Why and 1 ( &1) bitwise operation always return 0 or 1

I just started learning about bit wise operation and want to ask why and 1 ( &1) bitwise operation always return 0 or 1 .

javascript bit-manipulation bitwise-operators bitwise-and

Calcariferous asked 6/1, 2017 at 7:38

6

Solved

Why do a bitwise-and of a character with 0xff?

I am reading some code that implements a simple parser. A function named scan breaks up a line into tokens. scan has a static variable bp that is assigned the line to be tokenized. Following the as...

c char bitwise-and integer-promotion isspace

Seidel asked 24/5, 2021 at 19:5

7

explain arguments meaning in res = cv2.bitwise_and(img,img,mask = mask)

I am trying to extract blue colour of an input image. For that I create a blue HSV colour boundary and threshold HSV image by using the command mask_img = cv2.inRange(hsv, lower_blue, upper_blue) ...

python opencv bitwise-and

Filmdom asked 25/9, 2015 at 4:44

11

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XOR from only OR and AND

How do you do the XOR bitwise operation if you only have available the AND and the OR operations?

bitwise-operators xor bitwise-and

Remittee asked 17/1, 2011 at 16:8

3

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Doing a bitwise operation on bytes

I got two objects, a and b, each containing a single byte in a bytes object. I am trying to do a bitwise operation on this to get the two most significant bits (big-endian, so to the left). a = s...

python python-3.x bit-manipulation bitwise-and

Englut asked 23/3, 2014 at 16:47

3

Solved

BITWISE AND(&) for Range of Numbers

Given two numbers L & R , Find Bitwise AND of all numbers lying between L and R inclusive Constraints 1<= L,R <= (2^32). LL step = 1; while(L!=R) { L/=2; R/=2; step*=2; } cout<...

bit-manipulation bitwise-operators bitwise-and

Yeta asked 11/8, 2015 at 18:38

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Meaning of bitwise and(&) of a positive and negative number?

Can anyone help what n&-n means?? And what is the significance of it.

c++bitwise-and

Cupulate asked 13/3, 2013 at 20:2

1

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What is the function of bitwise & in this statement?

I have been reading about an implementation of the diamond-square algorithm in C# that wraps around to create seamless textures. To calculate the next point, an average is taken of four sample poin...

c#algorithm bitwise-operators bitwise-and

Fia asked 13/10, 2017 at 8:41

2

Significance of x & (-x) in 2's Complement?

Where '-' denotes negative x, and '&' denotes bitwise AND. The numbers are in 8-bit 2's complement in a program and I can't seem to find the correlation between inputs and outputs. 8 & (-...

bit-manipulation bit twos-complement bitwise-and

Cardioid asked 2/10, 2017 at 18:13

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Is there any reason to use (nr & 1 == 0) over (nr % 2 == 0) to check for parity?

Is there any actual difference in performance? Is it faster? (lets say I use it in at least 100 cases in the same program, would it improve my program in terms of speed?)

bit-manipulation bitwise-and parity

Arber asked 30/12, 2016 at 20:14

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Bit wise '&' with signed vs unsigned operand

I faced an interesting scenario in which I got different results depending on the right operand type, and I can't really understand the reason for it. Here is the minimal code: #include <iostr...

c++c++11 bitwise-and type-promotion sign-extension

Flue asked 3/8, 2016 at 7:25

2

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Why the ArrayDeque class use bitwise operation in the pollFirst method?

I look through java source code try to learn the implementation of collection. Found a interesting thing in the ArrayDeque class. public E pollFirst() { int h = head; @SuppressWarnings("unchecke...

java collections bitwise-operators bitwise-and arraydeque

Infallible asked 24/4, 2016 at 15:32

4

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Can I assume that a bitwise AND operation is O(1)? If so why?

My processor can only do arithmetic operations on 8-bit or 16-bit unsigned integers. 1) This means the word size for this processor is 16 bits, correct? Operations on words are O(1). The reaso...

algorithm time-complexity big-o bitwise-and

Antares asked 25/4, 2016 at 1:24

3

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What does (number & -number) mean in bit programming? [duplicate]

For example: int get(int i) { int res = 0; while (i) { res = (res + tree[i]) % MOD; i -= ( (i) & (-i) ); } return res; } A tree update function: void update(int i, int val) { w...

c++bit bitwise-and fenwick-tree

Photoflash asked 8/3, 2016 at 7:14

4

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What does value & 0xff do in Java?

I have the following Java code: byte value = 0xfe; // corresponds to -2 (signed) and 254 (unsigned) int result = value & 0xff; The result is 254 when printed, but I have no idea how this cod...

java integer byte bitwise-and

Phyfe asked 8/7, 2012 at 1:47

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Mask and extract bits in C

I've been looking at posts about masks, but I still can't get my head around how to extract certain bits from a number in C. Say if we have an integer number, 0001 1010 0100 1011, its hexadecimal r...

c mask bitwise-operators bit-shift bitwise-and

Fabliau asked 14/10, 2014 at 10:54

8

Solved

Bitwise AND on 32-bit Integer

How do you perform a bitwise AND operation on two 32-bit integers in C#? Related: Most common C# bitwise operations.

c#bitwise-and

Andante asked 18/12, 2009 at 16:39

1

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Translating bitwise comparison from C++ to C#

I've the given condition from a cpp source. if (!(faces & activeFace) || [...]) { ... } I want to translate this into C#. When I understand this right, this means as much as if activeFace i...

c#bitwise-operators bitwise-and

Lynden asked 4/8, 2014 at 19:40

3

Solved

Bitwise & in javascript not returning the expected result

I am working on BitWise AND operator in javascript. I have two 32 bit nunber 4294901760 (11111111 11111111 00000000 00000000) and 4294967040 (11111111 11111111 11111111 00000000) when I and t...

javascript bitwise-and

Hypertonic asked 4/4, 2013 at 7:26

1

java & operator with two integers?

From what I understand the & operator is similar to the && operator except that the && only checks the second if the first is true, while the & checks both regardless of the...

java bitwise-operators bitwise-and

Pasteboard asked 17/12, 2013 at 23:19

3

Solved

bitwise-ANDing with 0xff is important?

Doesn't bitwise-ANDing with 0xff essentially mean getting the same value back, for that matter, in this code? byte[] packet = reader.readPacket(); short sh; sh = packet[1]; sh &= 0xFF; System....

java byte bitwise-operators short bitwise-and

Aggrieved asked 27/9, 2013 at 23:23

4

Solved

bitwise AND in java with operator "&"

I just read this code following: byte[] bts = {8, 0, 0, 0}; if ((bts[i] & 0x01) == 0x01) Does this do the same thing as if (bts[i] == 0x01) If not,what's the difference between them? A...

java bitwise-operators bitwise-and

Rockery asked 31/7, 2013 at 10:54

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