bitwise compare

Bitwise operators allow you to evaluate and manipulate the bits specified in the integer number. Bitwise operators Example name result $a & $b and (bitwise AND) will set the 1 bit in the $a and $b to 1. $a | $b or (bitwise OR) sets any bit in the

Before you understand the displacement, look at the binary representations and relationships of positive and negative numbers:Example 15 and-15:15 The original code: 00000000 00000000 00000000 00001111Complement: 11111111 11111111 11111111 11110000+1

Discussion on bitwise operators and displacement operations, and operator displacement operations I have never understood how to calculate this, because I have never used it before, but now I want to understand it, so it is a good idea to understand

http://aokunsang.iteye.com/blog/615658Prelude:Yesterday a buddy asked me Java displacement you will, I said no, think about displacement so troublesome, generally have displacement Java code will not look, there are a few people would ah, right? But

The topics are as follows: Description The Hamming distance is the number of bits in the binary case where an integer becomes another integer that needs to be flipped. For example 2 conversion to 3 requires flipping 1

and Operations & Example:3&5Solution: 3 of the twos complement is 11, 5 is 101, 3&5 is 011&101, first look at the hundred (actually not the hundred, so it is easy to understand) a 1 1, according to (1&1=1,1&0=0,0&0=0,0 &1=0) that the hundred

It has to be said that the application of bit arithmetic is very ingenious.This problem asks for a continuous interval integer and the value of the operation, the breakout point lies in the continuous interval of this feature. We can find a few

1. The meaning of the return value in a call to a functionFunction F1 () {echo 1234;Return 123;//here to handle the returned value}Var_dump (F1 ());//Here is an understanding of the entire return value "function calls without a return value will not

Assignment operatorsThe PHP assignment operator is used to write values to variables. The base assignment operator in PHP is "=".This means that the right-hand copy expression sets the value for the left-hand operand._________________________________

Bitwise operations can often make incredible things. For example, how can we exchange two numbers without a temporary variable? One person who has never been familiar with such problems cannot think of it. If we use go as a metaphor, bitwise