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Swapping column values in MySQL
...ng the left-to-right evaluation process in MySQL.
Alternatively, just use XOR if they're numbers. You mentioned coordinates, so do you have lovely integer values, or complex strings?
Edit: The XOR stuff works like this by the way:
update swapper set foo = foo ^ bar, bar = foo ^ bar, foo = foo ^ b...
What's a correct and good way to implement __hash__()?
... suggests to combine the hashes of the sub-components using something like XOR, which gives us this:
class B(object):
def __init__(self, a, b, c):
self._a = a
self._b = b
self._c = c
def __eq__(self, othr):
if isinstance(othr, type(self)):
retur...
jQuery OR Selector?
...
The term 'xor' (exclusive or) would be the accurate term, but often people search for or when looking for xor, as xor is generally, in common terms, a specific type of 'or'.
– liljoshu
Jan 23 '19 ...
二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...主要通过BCH Code来计算
然后15个bits还要与101010000010010做XOR操作。这样就保证不会因为我们选用了00的纠错级别和000的Mask，从而造成全部为白色，这会增加我们的扫描器的图像识别的困难。
下面是一个示例：
关于Error Correctio...
How to simplify a null-safe compareTo() implementation?
...
Sweet use of XOR
– James McMahon
Mar 30 '12 at 18:53
9
...
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...
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...
.NET JIT potential error?
...lue properly:
for (oVec.x = 0; oVec.x < 2; oVec.x++) {
0000000a xor esi,esi ; oVec.x = 0
for (oVec.y = 0; oVec.y < 2; oVec.y++) {
0000000c mov edi,2 ; oVec.y = 2, WRONG!
oDoesSomething.Do(oVec);
000000...
Code Golf - π day
...: 490 chars
mov si,80h
mov cl,[si]
jcxz ret
mov bx,10
xor ax,ax
xor bp,bp
dec cx
a:mul bx
mov dl,[si+2]
sub dl,48
cmp dl,bl
jae ret
add ax,dx
inc si
loop a
mov dl,al
inc dl
mov dh,al
add dh,dh
mov ch,dh
mul al
mov...