大约有 43,100 项符合查询结果（耗时：0.0429秒） [XML]
Efficient SQL test query or validation query that will work across all (or most) databases
...
13 Answers
13
Active
...
Waiting until two async blocks are executed before starting another block
...
10 Answers
10
Active
...
pandas: filter rows of DataFrame with operator chaining
...
14 Answers
14
Active
...
How does the C code that prints from 1 to 1000 without loops or conditional statements work?
I've found C code that prints from 1 to 1000 without loops or conditionals :
But I don't understand how it works. Can anyone go through the code and explain each line?
...
List of All Locales and Their Short Codes?
...know about them when you write your application. My Windows 7 system has 211 locales installed (listed below), so you wouldn't likely write any custom code or translation specific to this many locales.
The most important thing for various versions of English is in formatting numbers and dates. Ot...
Loop backwards using indices in Python?
I am trying to loop from 100 to 0. How do I do this in Python?
15 Answers
15
...
How to drop columns by name in a data frame
...
11 Answers
11
Active
...
how to ignore namespaces with XPath
...
168
You can use the local-name() XPath function. Instead of selecting a node like
/path/to/x:some...
Printing everything except the first field with awk
...
16 Answers
16
Active
...
List of lists into numpy array
...nacio Vazquez-Abrams will not work. Instead there are at least 3 options:
1) Make an array of arrays:
x=[[1,2],[1,2,3],[1]]
y=numpy.array([numpy.array(xi) for xi in x])
type(y)
>>><type 'numpy.ndarray'>
type(y[0])
>>><type 'numpy.ndarray'>
2) Make an array of lists:...