大约有 43,176 项符合查询结果（耗时：0.0570秒） [XML]
How to add pandas data to an existing csv file?
...
|
edited Nov 1 '17 at 17:10
root
23.8k44 gold badges5151 silver badges6464 bronze badges
an...
SQL Server : Columns to Rows
...from yourtable
unpivot
(
indicatorvalue
for indicatorname in (Indicator1, Indicator2, Indicator3)
) unpiv;
Note, the datatypes of the columns you are unpivoting must be the same so you might have to convert the datatypes prior to applying the unpivot.
You could also use CROSS APPLY with UNIO...
Can I pass an array as arguments to a method with variable arguments in Java?
...
185
The underlying type of a variadic method function(Object... args) is function(Object[] args). ...
How can I add new keys to a dictionary?
...
16 Answers
16
Active
...
How to import multiple .csv files at once?
...
13 Answers
13
Active
...
Looping over a list in Python
...n mylist[:] and your len(x) should be equal to 3.
>>> mylist = [[1,2,3],[4,5,6,7],[8,9,10]]
>>> for x in mylist:
... if len(x)==3:
... print x
...
[1, 2, 3]
[8, 9, 10]
or if you need more pythonic use list-comprehensions
>>> [x for x in mylist if len(x)==3...
Execute Python script via crontab
...e a python script using the Linux crontab. I want to run this script every 10 minutes.
3 Answers
...
cannot load such file — zlib even after using rvm pkg install zlib
I installed zlib package and ruby 1.9.3 using rvm, but whenever I try to install
gems it says
cannot load such file -- zlib
...
Visual Studio or Resharper functionality for placement of using directives
...
UPDATE - ReSharper 2016.1: This option is now moved to Code Editing → C# → Code Style → Add 'using' directive to the deepest scope
Have you tried the ReSharper option:
Languages → C# → Formatting Style → Namespace Imports → Add us...
Mimicking sets in JavaScript?
...bj = {};
// or create an object with some items already in it
var obj = {"1":true, "2":true, "3":true, "9":true};
Question 1: Is A in the list:
if (A in obj) {
// put code here
}
Question 2: Delete 'A' from the list if it's there:
delete obj[A];
Question 3: Add 'A' to the list if it wasn't a...