Questions tagged [bitwise-not]
24 questions
0
votes
1 answer
Why does NOT give an unexpected result when flipping 1?
I am currently learning the process of bitwise operators, and I've come across something that I can't quite figure out.
Im currently working with the NOT(~) operator, which should invert all of the bits. So in order to get a better understanding of…
James Radcliff
- 49
- 5
0
votes
2 answers
Bitwise not in python over unsigned numbers
I want to do a bitwise not in Python, but withouth taking care of the sign, as C would do. For example:
>>> x = 4
>>> y = ~x
>>> bin(x)
'0b100'
>>> bin(y)
'0b101'
In the above code, y is 0b101, but I want it to be 0b011, literally the bitwise not…
Dan
- 2,452
- 20
- 45
0
votes
0 answers
How 5 is represented as -6 and -5 is represented as 4 in Java on using bitwise NOT operator?
I was trying to understand bitwise NOT operator in Java.
On running the below code, I am getting the output as -6.
class Test {
public static void main (String[] args) {
int x = 5;
System.out.println(~x);
}
}
And on running…
Eric Kaiser
- 1
- 3
0
votes
2 answers
Python: How is a ~ used to exclude data?
In the below code I know that it is returning all records that are outside of the buffer, but I'm confused as to the mechanics of how that is happening.
I see that there is a "~" (aka a bitwise not) being used. From some googling my understanding…
Stephen
- 133
- 1
- 9
0
votes
0 answers
Why is the "NOT" bitwise operator showing output -1 or negative in PHP?
I am checking bitwise NOT operator including OR in Php but don't get why the output is -1. Is there anyone who can explain why the output is 1 of the following code?
Thanks in Advance
$x = 15;
$y = 3;
echo $x | ~$y;
Output: -1;
0
votes
1 answer
Assembler invert XMM register
I have to invert the contents of a 128-bit XMM register.
I've tried it in many different ways, but all I get is a not-so-nice error message.
I'm thankful for all kinds of help.
pichlbaer
- 923
- 1
- 10
- 18
-1
votes
1 answer
How python bitwise operator '~' working in this code?
Below code works fine and pass all the test cases but I don't know how this bitwise operator doing in this code, it's 275 leetcode problem:
class Solution:
def hIndex(self, citations: List[int]) -> int:
l, r = 0, len(citations)
…
Nefarious
- 11
- 1
- 4
-1
votes
3 answers
~ Unary Operator and Bitwise Tests Give Negative Results
I was studying bitwise operators and they make sense until the unary ~one's complement is used with them. Can anyone explain to me how this works?
For example, these make sense however the rest of the computations aside from these do not:
1&~0 = 1 …
user11839113
-3
votes
1 answer
Nesting conditional operators in a return statement
So I setup a code that finds the magnitude (absolute value) of the difference between the user's input and 51. If the user's input is greater than 51 the result is tripled. Not complicated. In an effort to minimize the code itself I came up with…
Alan Jurisich
- 1
- 4