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Redefining NULL
... trick is to hack the compiler so that pointer<->integer conversions XOR a specific value that is an invalid pointer and still trivial enough that the target architecture can do that cheaply (usually, that would be a value with a single bit set, such as 0x20000000).
– Sim...
Git: Remove committed file after push
... answered Feb 26 '14 at 12:25
xorxor
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...
How are echo and print different in PHP? [duplicate]
... is just about at the bottom
of the precedence list though. Only , AND OR XOR are lower.
Parameter(s). The grammar is: echo expression [, expression[,
expression] ... ] But echo ( expression, expression ) is not valid.
This would be valid: echo ("howdy"),("partner"); the same as: echo
"howdy","...
App Inventor 2 时间处理教程 - 时间戳转换、格式化与计算 · App Inventor 2 中文网
...stant)
获取毫秒时间戳
MakeInstant(from)
从文本创建时间
MakeInstantFromMillis(ms)
从毫秒创建时间
Duration(start, end)
计算时间差
AddDuration(instant, duration)
时间加偏移
...
How can I ensure that a division of integers is always rounded up?
...ositive by checking that the signs of both integers are identical. Integer xor operator '^' on the two values will result in a 0 sign-bit when this is the case, meaning a non-negative result, so the check (a ^ b) >= 0 determines that the result should have been positive before rounding. Also note...
Code Golf: Collatz Conjecture
...p ebx, 1
jne .loop
push ebx
push end
call printf
add esp, 16
xor eax, eax
ret
.usage:
mov ebx, [esp+0x08]
push dword [ebx+0x00]
push usage
call printf
add esp, 8
mov eax, 1
ret
msg db "%d --> ", 0
end db "%d", 10, 0
usage db "Usage: %s NUMBER", 10, 0
...
Is there a better way of writing v = (v == 0 ? 1 : 0); [closed]
...in different languages (VB). Yes a quick look-up will tell you that its an XOR operator and you will understand what its doing, but to many it may not be obvious at first glance. I don't think that means you need to quit your job.
– JD Isaacks
Aug 2 '11 at 15:4...
实现一个简单的服务端推方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...压力可想而知，此时我们虽然可以通过针对数据库使用主从复制，分片等技术来缓解问题，但那毕竟只是治标不治本。
我们的目标是实现一个简单的服务端推方案，但简单绝对不意味着简陋，轮询数据库是不可以接受的，下面...
What does numpy.random.seed(0) do?
...non-uniform distributions for some few first iterations because of the way xor works, but this depends on the algorithm, and is beyond my current worries and the scope of this question.
share
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impr...
Real world use cases of bitwise operators [closed]
...t into every area where these operators are used in graphics programming. XOR (or ^) is particularly interesting here because applying the same input a second time will undo the first. Older GUIs used to rely on this for selection highlighting and other overlays, in order to eliminate the need for...