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Write bytes to file
... 6 bytes into a byte array and writes it to another byte array. It does an XOR operation with the bytes so that the result written to the file is the same as the original starting values. The file is always 6 bytes in size, since it writes at position 0.
using System;
using System.IO;
namespace Co...
.NET JIT potential error?
...lue properly:
for (oVec.x = 0; oVec.x < 2; oVec.x++) {
0000000a xor esi,esi ; oVec.x = 0
for (oVec.y = 0; oVec.y < 2; oVec.y++) {
0000000c mov edi,2 ; oVec.y = 2, WRONG!
oDoesSomething.Do(oVec);
000000...
What's a correct and good way to implement __hash__()?
... suggests to combine the hashes of the sub-components using something like XOR, which gives us this:
class B(object):
def __init__(self, a, b, c):
self._a = a
self._b = b
self._c = c
def __eq__(self, othr):
if isinstance(othr, type(self)):
retur...
How did I get a value larger than 8 bits in size from an 8-bit integer?
...
The assembler code reveals the problem:
:loop
mov esi, ebx
xor eax, eax
mov edi, OFFSET FLAT:.LC2 ;"c: %i\n"
sub ebx, 1
call printf
cmp ebx, -301
jne loop
mov esi, -45
mov edi, OFFSET FLAT:.LC2 ;"c: %i\n"
xor eax, eax
call printf
EBX should be anded with FF post decremen...
Cleanest way to toggle a boolean variable in Java?
... search terms. The code above doesn't. For those who need it, it's bitwise XOR as described here.
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Why would finding a type's initializer throw a NullReferenceException?
...e`8d4500fb 41b903000000 mov r9d,3
000007fe`8d450101 4533c0 xor r8d,r8d
000007fe`8d450104 ba38000000 mov edx,38h
000007fe`8d450109 498bcb mov rcx,r11
000007fe`8d45010c 41ff5228 call qword ptr [r10+28h]
000007fe`8d450110 48bb1032531200000000 mov rbx,...
Avoiding if statement inside a for loop?
...rite_vector(int*, int*, bool)+0x40>
4005d3: 31 ed xor %ebp,%ebp
4005d5: 0f 1f 00 nopl (%rax)
4005d8: 8b 13 mov (%rbx),%edx
4005da: 89 ee mov %ebp,%esi
4005dc: 31 c0 xor %eax,%e...
Easiest way to flip a boolean value?
...han longVariableName = !longVariableName; And every programmer should know XOR.
– xamid
Oct 5 '17 at 16:15
3
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Random shuffling of an array
...
The xor trick is great for swapping CPU registers when the CPU has no swap instruction and there are no free registers, but for swapping array elements inside a loop, I don’t see any benefit. For the temporary local variables, ...
Logic to test that 3 of 4 are True
...
Not sure it is simpler, but maybe.
((x xor y) and (a and b)) or ((x and y) and (a xor b))
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