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Seeding the random number generator in Javascript
...nitial states.
var seed = 1337 ^ 0xDEADBEEF; // 32-bit seed with optional XOR value
// Pad seed with Phi, Pi and E.
// https://en.wikipedia.org/wiki/Nothing-up-my-sleeve_number
var rand = sfc32(0x9E3779B9, 0x243F6A88, 0xB7E15162, seed);
for (var i = 0; i < 15; i++) rand();
The output of these ...
Hash function that produces short hashes?
...t, like MD5 (128 bits) or SHA1 (160). Then you can shorten that further by XORing sections of the digest with other sections. This will increase the chance of collisions, but not as bad as simply truncating the digest.
Also, you could include the length of the original data as part of the result to...
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 are “first class” objects?
..., '__rpow__', '__rrshift__', '__rshift__', '__rsub__', '__rtruediv__', '__rxor__', '__setattr__', '__str__', '__sub__', '__truediv__', '__xor__']
Because everything's a first-class object in Python, there are relatively few obscure special cases.
In Java, for example, there are primitive types ...
二进制数据专题：蓝牙、Socket、WebSocket、MQTT 收发字节 · App Inventor 2 中文网
...onnected) {
蓝牙客户端1.SendBytes(二进制1.AppendChecksum(帧, "XOR8"))
标签1.Text = 二进制1.ToHex(二进制1.AppendChecksum(帧, "XOR8"))
} else {
标签1.Text = "请先连接蓝牙设备"
}
}
when 滑动条_左.PositionChanged(滑块位置) {
发送速度(round(滑...
Listing all permutations of a string/integer
...is better to be implemented with a temporary buffer variable and not using XORs (dotnetperls.com/swap)
– Sergioet
Feb 17 '17 at 18:15
7
...
How do I make a list of data frames?
...ic indices to access your data frames (and you can use both, this isn't an XOR choice).
Overall, using lists will lead you to write cleaner, easier-to-read code, which will result in fewer bugs and less confusion.
share
...
STL or Qt containers?
...ture, if need be.
The same is true of doubly linked lists, which could use XOr linking to drastically reduce space used. Again, this is impossible with Qt, due to it's requirements for growth and COW.
COW can indeed make something lighter, but so can Intrusive Containers, such as supported by boost,...
Evaluating a mathematical expression in a string
...st.Mult: op.mul,
ast.Div: op.truediv, ast.Pow: op.pow, ast.BitXor: op.xor,
ast.USub: op.neg}
def eval_expr(expr):
"""
>>> eval_expr('2^6')
4
>>> eval_expr('2**6')
64
>>> eval_expr('1 + 2*3**(4^5) / (6 + -7)')
-5.0
...
MFC学习总结 (90个技巧) dlg 上建立View - C/C++ - 清泛网 - 专注C++内核技术
...用于与它要显示的位置的图像做“AND”操作，另一个作“XOR”操作。
透明：用“白色”AND,用“黑色”XOR
反色：用“白色”AND,用“白色”XOR
正常色：用“黑色”AND,用正常颜色XOR.
(2). WIN9X中好像是对像素的操作实现透明的
WIN...