bitwise-and

问题 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 operators in Kotlin? 回答1: You have named functions for them. Directly from Kotlin docs As of bitwise operations, there're no special characters for them, but just named functions that can be called in infix form. for example: val x = (1 shl 2) and 0x000FF000 Here is the complete list of bitwise operations (available

问题 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 operators in Kotlin? 回答1: You have named functions for them. Directly from Kotlin docs As of bitwise operations, there're no special characters for them, but just named functions that can be called in infix form. for example: val x = (1 shl 2) and 0x000FF000 Here is the complete list of bitwise operations (available

问题 I have a problem understanding this code. What I know is that we have passed a code into a assembler that has converted code into "byte code". Now I have a Virtual machine that is supposed to read this code. This function is supposed to read the first byte code instruction. I don't understand what is happening in this code. I guess we are trying to read this byte code but don't understand how it is done. static int32_t bytecode_to_int32(const uint8_t *bytecode, size_t size) { int32_t result;

问题 I have a problem understanding this code. What I know is that we have passed a code into a assembler that has converted code into "byte code". Now I have a Virtual machine that is supposed to read this code. This function is supposed to read the first byte code instruction. I don't understand what is happening in this code. I guess we are trying to read this byte code but don't understand how it is done. static int32_t bytecode_to_int32(const uint8_t *bytecode, size_t size) { int32_t result;

问题 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) After that I used a bitwise_and on the input image and the threshold image by using res = cv2.bitwise_and(img,img,mask = mask_img) Where 'img' is the input image. This code I got from the opencv. But I didn't understand why three arguments used in bitwise_and and what is actually each arguments mean?

问题 Please help to solve this problem and explain the logic. I don't know how the & operator is working here. void main() { int a = -1; static int count; while (a) { count++; a &= a - 1; } printf("%d", count); } 回答1: If you are referring to a&=a-1; then it is a bitwise and operation of a and a-1 copied into a afterwards. Edit: As copied from Tadeusz A. Kadłubowski in the comment: a = a & (a-1); 回答2: The expression a&=a-1; clears the least significant bit (rightmost 1) of a . The code counts the

问题 How do you perform a bitwise AND operation on two 32-bit integers in C#? Related: Most common C# bitwise operations. 回答1: With the & operator 回答2: Use the & operator. Binary & operators are predefined for the integral types[.] For integral types, & computes the bitwise AND of its operands. From MSDN. 回答3: var x = 1 & 5; //x will = 1 回答4: const uint BIT_ONE = 1, BIT_TWO = 2, BIT_THREE = 4; uint bits = BIT_ONE + BIT_TWO; if((bits & BIT_TWO) == BIT_TWO){ /* do thing */ } 回答5: use & operator (not

问题 I have a table which contains an answer. This answer is a combination of a set list of numbers. (see below) Possible values 2 4 8 16 32 64 If I have the answer of Answer 24 – I need some method to work out the only values that could have been selected are 16 and 8. I am told if this where SQL I would use a bitwise operation. I am fairly advance in Access but tend not to use VBA code, but am open to all ideas. 回答1: Compare KB194206 (the gist of it: "The Microsoft Jet database engine does not

问题 I have a table which contains an answer. This answer is a combination of a set list of numbers. (see below) Possible values 2 4 8 16 32 64 If I have the answer of Answer 24 – I need some method to work out the only values that could have been selected are 16 and 8. I am told if this where SQL I would use a bitwise operation. I am fairly advance in Access but tend not to use VBA code, but am open to all ideas. 回答1: Compare KB194206 (the gist of it: "The Microsoft Jet database engine does not

问题 Currently i am trying to track multiple objects by color. I've based on documentation code. import cv2 import numpy as np cap = cv2.VideoCapture(0) while(1): # Take each frame _, frame = cap.read() # Convert BGR to HSV hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV) # define range of blue color in HSV lower_blue = np.array([110,50,50]) upper_blue = np.array([130,255,255]) # Threshold the HSV image to get only blue colors mask = cv2.inRange(hsv, lower_blue, upper_blue) # Bitwise-AND mask and