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How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
... 83 ec 08 sub $0x8,%rsp
4: 31 ff xor %edi,%edi
6: e8 00 00 00 00 callq b <main+0xb>
7: R_X86_64_PC32 time-0x4
b: 48 85 c0 test %rax,%rax
e: 75 14 jne ...
Background color of text in SVG
...od-color="yellow"/>
<feComposite in="SourceGraphic" operator="xor" />
</filter>
</defs>
<text filter="url(#solid)" x="20" y="50" font-size="50">solid background</text>
</svg>
...
Logical operators for boolean indexing in Pandas
...s np.logical_and
or has np.logical_or
not has np.logical_not
numpy.logical_xor which has no Python equivalent but is a logical "exclusive or" operation
So, essentially, one should use (assuming df1 and df2 are pandas DataFrames):
np.logical_and(df1, df2)
np.logical_or(df1, df2)
np.logical_not(df...
Two-way encryption: I need to store passwords that can be retrieved
...s to store passwords in encrypted way, I would suggest you to use a simple XOR Cipher. The main problem with this algorithm is that it could be easily broken by frequency analysis. However as generally passwords are not made from long paragraphs of English text I don't think you should worry about i...
How does the Comma Operator work
...following syntax possible and meaningful:
keywords = "and", "or", "not", "xor";
Notice that due to operator precedence, the code is (intentionally!) identical to
(((keywords = "and"), "or"), "not"), "xor";
That is, the first operator called is keywords.operator =("and") which returns a proxy o...
What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
...k I see it. That seems to interact rather oddly with my definition of the Xor type… I'll have to think about that. Thanks!
– Antal Spector-Zabusky
Jun 3 '10 at 22:54
...
CoInitialize浅析一 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...c_76A0B8C7
769AEF72 push edi
769AEF73 xor edi, edi
769AEF75 cmp [ebp+8], edi ; 判断第一个参数是否为NULL
769AEF78 jnz loc_76A0B8D1
769AEF7E
769AEF7Eloc_769AEF7E:
769AEF7E call ?IsRu...
How do I set a textbox's text to bold at run time?
... = new Font( r.SelectionFont, r.SelectionFont.Style ^ FontStyle.Bold ); // XOR will toggle
return true;
}
if ( keyData == ( Keys.Control | Keys.U ) )
{
r.SelectionFont = new Font( r.SelectionFont, r.SelectionFont.Style ^ FontStyle.Underline ); // XO...
C++ unordered_map using a custom class type as the key
...arting point for a hash function is one that uses bit shifting and bitwise XOR to combine the individual hash values. For example, assuming a key-type like this:
struct Key
{
std::string first;
std::string second;
int third;
bool operator==(const Key &other) const
{ return (f...
How do function pointers in C work?
... mov ebx,DWORD PTR [ebx]
c: 31 c3 xor ebx,eax # pointless xor-swap
e: 31 d8 xor eax,ebx # instead of just storing with opposite registers
10: 31 c3 xor ebx,eax
12: 8b 4c 2...