Is there any sence in performing binary AND with a number where all bits are set to 1

Posted by n535 on Stack Overflow See other posts from Stack Overflow or by n535
Published on 2010-03-27T12:38:03Z Indexed on 2010/03/27 12:43 UTC
Read the original article Hit count: 309

Filed under:

binary

|

math

Greetings everybody. I have seen examples of such operations for so many times that i began to think that i am getting something wrong with binary arithmetics. Is there any sense to perform the following:

byte value = someAnotherByteValue & 0xFF;

I don't really understand this, because it does not change anything anyway. Thanks for help.

P.S. I was trying to search for information both elsewhere and here, but unsuccessfully.

© Stack Overflow or respective owner

Related posts about binary

Finding if a Binary Tree is a Binary Search Tree

as seen on Stack Overflow - Search for 'Stack Overflow'
Today I had an interview where I was asked to write a program which takes a Binary Tree and returns true if it is also a Binary Search Tree otherwise false. My Approach1: Perform an inroder traversal and store the elements in O(n) time. Now scan through the array/list of elements and check if element… >>> More
Binary to strings as binary? C #/.NET

as seen on Stack Overflow - Search for 'Stack Overflow'
Redis keys are binary safe. I'd like to mess around and put binary into redis using C#. My client of choice doesn't support writing binary keys it uses keys and it make sense. However i am just fooling around so tell me how i can do this. How do i convert a raw byte[] into a string? At first i was… >>> More
EXC_BAD_ACCESS and KERN_INVALID_ADDRESS after intiating a print sequence.

as seen on Stack Overflow - Search for 'Stack Overflow'
MAC G4/1.5GHz/2GB/1TB+ OS10.4.11 Start up Volume has been erased/complete reinstall with updated software. Current problem only occurs when printing to an Epson Artisan 800 [USB as well as Ethernet connected] when using Macromedia FreeHand 10.0.1.67. All other apps/printers work fine. Memory has been… >>> More
How to convert binary read/write to non-binary read/write in C++

as seen on Stack Overflow - Search for 'Stack Overflow'
I have some C++ code from somewhere that reads and writes data in binary format. I want to see what it's reading and writing in the file, so I want to convert it's binary read and write to non-binary read and write. Also, when I convert the binary write to non-binary write, I want it to still be… >>> More
division by 2 in Binary Signed digit (Redundant Binary representation)

as seen on Stack Overflow - Search for 'Stack Overflow'
How can I do division by 2 in Binary Signed digit (Redundant Binary representation) ? Shifting won't work right ? >>> More

Related posts about math

how to make a function recursive

as seen on Stack Overflow - Search for 'Stack Overflow'
i have this huge function and i am wondering how to make it recursive. i have the base case which should never come true, so it should always go to else and keep calling itself with the variable t increases. any help would be great thanks def draw(x, y, t, planets): if 'Satellites' in planets["Moon"]: … >>> More
Sunrise / set calculations

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to calculate the sunset / rise times using python based on the link provided below. My results done through excel and python do not match the real values. Any ideas on what I could be doing wrong? My Excel sheet can be found under .. http://transpotools.com/sun_time.xls # Created on… >>> More
Android-Java: Constructing a triangle based on Coordinates on a map and your bearing

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi Guys, I'm constructing a geolocation based application and I'm trying to figure out a way to make my application realise when a user is facing the direction of the given location (a particular long / lat co-ord). I've got the math figured, I just have the triangle to construct. //UPDATE So… >>> More
Math.max and Math.min outputting highest and lowest values allowed

as seen on Stack Overflow - Search for 'Stack Overflow'
so I'm trying to make a program that will output the sum, average, and smallest and largest values. I have everything basically figured out except the smallest and largest values are outputting 2147483647 and -2147483647, which I believe are the absolute smallest and largest values that Java will… >>> More
Is Programming == Math?

as seen on Stack Overflow - Search for 'Stack Overflow'
I've heard many times that all programming is really a subset of math. Some suggest that OO, at its roots, is mathematically based. I don't get the connection. Aside from some obvious examples: using induction to prove a recursive algorithm formal correctness proofs functional languages lambda calculus asymptotic… >>> More