大约有 49,000 项符合查询结果（耗时：0.0407秒） [XML]
Is 161803398 A 'Special' Number? Inside of Math.Random()
...here 0 < k < j and @ is any binary operation (subtraction, addition, xor).
There are several implementations of this generator. Knuth offers an implementation in
FORTRAN in his book. I found the following code, with the following comment:
PARAMETER (MBIG=1000000000,MSEED=161803398,MZ=0,F...
C#位运算符（C#按位与、按位或 等） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...d\nb=%d\nc=%d\n",a,b,c);
}
三、“异或”运算符(^)
也称XOR运算符。
1、运算规则
若参加运算的两个二进位同号，则结果为0（假）；异号则为1（真），即：
0^0=0，0^1=1，1^0=1，1^1=0.
2、用途
(1)使特定位翻转
...
What is getattr() exactly and how do I use it?
...alues:
>>> dir(1000)
['__abs__', '__add__', ..., '__trunc__', '__xor__', 'bit_length', 'conjugate', 'denominator', 'from_bytes', 'imag', 'numerator', 'real', 'to_bytes']
>>> obj = 1000
>>> for attr_name in dir(obj):
... attr_value = getattr(obj, attr_name)
... pr...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
...f you wanted get a look at sequences of longer than width*height you could xor the next image with this one pixel-per-pixel. I think the QuickRandom picture is much more aesthetically pleasing though, on account of it being textured like a seaweed carpet.
– Cris Stringfellow
...
subtle differences between JavaScript and Lua [closed]
...xample, if foo ~= 20 then ... end.
Lua 5.3 and up use ~ for binary bitwise XOR, whereas JS uses ^.
In Lua, any type of value (except nil and NaN) can be used to index a table. In JavaScript, all non-string types (except Symbol) are converted to strings before being used to index an object. For exam...
__FILE__, __LINE__, and __FUNCTION__ usage in C++
... It's possible with constexpr that uses a lookup table or bitwise XOR, etc. to obfuscate any string literals in your binary. There are various examples out there if you search. Of course obfuscation is just obfuscation and not security, but if you don't want to make your files and functions...
What's the (hidden) cost of Scala's lazy val?
...) and initializes the target field in a synchronized block if the relevant xor of the bitmap indicates it is necessary.
Using:
class Something {
lazy val foo = getFoo
def getFoo = "foo!"
}
produces sample bytecode:
0 aload_0 [this]
1 getfield blevins.example.Something.bitmap$0 : int [15...
What is the best algorithm for overriding GetHashCode?
... quite how important that is.)
This is better than the common practice of XORing hashcodes for two main reasons. Suppose we have a type with two int fields:
XorHash(x, x) == XorHash(y, y) == 0 for all x, y
XorHash(x, y) == XorHash(y, x) for all x, y
By the way, the earlier algorithm is the one c...
How do you set, clear, and toggle a single bit?
... string with the bitwise NOT operator (~), then AND it.
Toggling a bit
The XOR operator (^) can be used to toggle a bit.
number ^= 1UL << n;
That will toggle the nth bit of number.
Checking a bit
You didn't ask for this, but I might as well add it.
To check a bit, shift the number n to the ri...
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...