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What does the ^ operator do in Java?
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The ^ operator in Java
^ in Java is the exclusive-or ("xor") operator.
Let's take 5^6 as example:
(decimal) (binary)
5 = 101
6 = 110
------------------ xor
3 = 011
This the truth table for bitwise (JLS 15.22.1) and logical (JLS 15.22.2) xor:
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What does (x ^ 0x1) != 0 mean?
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The XOR operation (x ^ 0x1) inverts bit 0. So the expression effectively means: if bit 0 of x is 0, or any other bit of x is 1, then the expression is true.
Conversely the expression is false if x == 1.
So the test is the same ...
Find XOR of all numbers in a given range
... typically between 1 and 4,000,000,000 inclusive. You have to find out the XOR of all the numbers in the given range.
5 Ans...
Logical XOR operator in C++?
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For a true logical XOR operation, this will work:
if(!A != !B) {
// code here
}
Note the ! are there to convert the values to booleans and negate them, so that two unequal positive integers (each a true) would evaluate to false.
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How do you get the logical xor of two variables in Python?
How do you get the logical xor of two variables in Python?
24 Answers
24
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Best way to reverse a string
...'t need to mention unicode: chars in C# are unicode characters, not bytes. Xor may be faster, but apart from being far less readable, that may even be what Array.Reverse() uses internally.
– Nick Johnson
Oct 23 '08 at 13:18
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What does the caret operator (^) in Python do?
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It's a bitwise XOR (exclusive OR).
It results to true if one (and only one) of the operands (evaluates to) true.
To demonstrate:
>>> 0^0
0
>>> 1^1
0
>>> 1^0
1
>>> 0^1
1
To explain one of your own exa...
Why is there no logical xor in JavaScript?
Why is there no logical xor in JavaScript?
19 Answers
19
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Why is XOR the default way to combine hashes?
...nt to combine them. I've read that a good way to combine two hashes is to XOR them, e.g. XOR( H(A), H(B) ) .
9 Answers
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Swapping two variable value without using third variable
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Using the xor swap algorithm
void xorSwap (int* x, int* y) {
if (x != y) { //ensure that memory locations are different
*x ^= *y;
*y ^= *x;
*x ^= *y;
}
}
Why the test?
The test is to ensure that x an...