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Random shuffling of an array
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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
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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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Zero-based month numbering [closed]
...m Assembly programmers. Instead of assigning 1 to the count register, they XOR'ed the register with itself, which was slightly faster in CPU cycles. This meant that counting would start with 0 and would always be up to the length of elements, excluding the last one.
Also, the use of zero is also po...
Split function equivalent in T-SQL?
... answered Mar 30 '09 at 14:52
XORXOR
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BSS段、数据段、代码段、堆与栈 剖析 - C/C++ - 清泛网 - 专注C/C++及内核技术
..._run$[ebp+28], 8
mov DWORD PTR _run$[ebp+32], 9
mov ecx, 91 ; 0000005bH
xor eax, eax
lea edi, DWORD PTR _run$[ebp+36]
rep stosd
; Line 15
mov DWORD PTR _i$[ebp], 0
jmp SHORT $L534
$L535:
mov eax, DWORD PTR _i$[ebp]
add eax, 1
mov DWORD PTR _i$[ebp], eax
$L534:
cmp DWORD PTR _i$[ebp], 1...
When should the volatile keyword be used in C#?
... (IA32):
void main()
{
00401000 push ecx
int j = 0;
00401001 xor ecx,ecx
for (int i = 0 ; i < 100 ; ++i)
00401003 xor eax,eax
00401005 mov edx,1
0040100A lea ebx,[ebx]
{
j += i;
00401010 add ecx,eax
00401012 add eax,e...
Do sealed classes really offer performance Benefits?
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Orion EdwardsOrion Edwards
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PHP 5 disable strict standards error
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I want to point out that using ^ ("xor") rather than & ~ ("and not") is a bad idea! ^ depends on the assumption that e.g. E_STRICT is part of E_ALL and always will be part of it. This is bad because E_ALL did change in the past (E_STRICT wasn't past of it,...
Remove duplicates in the list using linq
... Works well and got me to learn something new and investigate the XoR operator ^ in C#. Had used in VB.NET via Xor but had to do a double take to your code to see what it was at first.
– atconway
May 2 '14 at 15:51
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What's the simplest way to test whether a number is a power of 2 in C++?
...he numbers is 0 0 0 0 = 0.
Time complexity : O(1).
Approach #3:
Bitwise XOR the number with its just previous number should be sum of both numbers.
Example: Number = 8
Binary of 8: 1 0 0 0
Binary of 7: 0 1 1 1 and the bitwise XOR of both the numbers is 1 1 1 1 = 15.
Time complexity : O(1).
htt...