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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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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...
How to know if two arrays have the same values
...s and order of each value) you could do this by using lodash:
_.isEmpty(_.xor(array1, array2))
Short, simple and pretty!
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ASP.NET Identity's default Password Hasher - How does it work and is it secure?
...lt;= secondHash.Length ? firstHash.Length : secondHash.Length;
var xor = firstHash.Length ^ secondHash.Length;
for (int i = 0; i < _minHashLength; i++)
xor |= firstHash[i] ^ secondHash[i];
return 0 == xor;
}
In in your custom ApplicationUserManager, you s...
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,...
Is multiplication and division using shift operators in C actually faster?
... optimised approach
#define N 0
int x; .word x xor registerA, registerA
x *= N; move x -> registerA
move x -> registerB
A = B * immediate(0)
store registerA -> x
...............do something more with x...
Show current assembly instruction in GDB
...<exit> │
│0x7ffff740d774 <__libc_start_main+244> xor %edx,%edx │
│0x7ffff740d776 <__libc_start_main+246> jmpq 0x7ffff740d6b9 <__libc_start│
│0x7ffff740d77b <__libc_start_main+251> mov 0x39ca2e(%rip),%rax #│
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Tetris-ing an array
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Well, considering that you can use XOR in this situation to find the common parts of the string. Any time you xor two bytes that are the same, you get a nullbyte as the output. So we can use that to our advantage:
$first = $array[0];
$length = strlen($first...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
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Another related trick is to use XOR EAX, EAX because XOR RAX, RAX would need an REX prefix.
– Neil
Oct 2 '13 at 9:12
3
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Try-catch speeding up my code?
...ush esi
[0005] push ebx
[0006] sub esp,1Ch
[0009] xor eax,eax
[000b] mov dword ptr [ebp-20h],eax
[000e] mov dword ptr [ebp-1Ch],eax
[0011] mov dword ptr [ebp-18h],eax
[0014] mov dword ptr [ebp-14h],eax
[0017] xor eax,eax
...