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A transport-level error has occurred when receiving results from the server [closed]
...ction pool of your app; as a result, when you pickup the shared connection string and try to execute it's not able to reach the database. If you are developing Visual Studio, simply close the temporary web server on your task bar.
If it happens in production, resetting your application pool for yo...
Print new output on same line [duplicate]
...a file-like object (stream); defaults to the current sys.stdout.
sep: string inserted between values, default a space.
end: string appended after the last value, default a newline.
You can use the end keyword:
>>> for i in range(1, 11):
... print(i, end='')
...
12345678910...
Is there a performance impact when calling ToList()?
...all files' names immediately into memory, it has a potential risk that the string[] costs a lot of memory, slowing down everything.
What should be done then
It depends. If you(as well as your business logic) gurantees that the file amount in the folder is always small, the code is acceptable. But ...
How to update column with null value
...have tried this many different ways and the best I have gotten is an empty string.
13 Answers
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GroupBy pandas DataFrame and select most common value
I have a data frame with three string columns. I know that the only one value in the 3rd column is valid for every combination of the first two. To clean the data I have to group by data frame by first two columns and select most common value of the third column for each combination.
...
Where can I learn how to write C code to speed up slow R functions? [closed]
...rikes me is that you find R somewhat tedious (data manipulation, graphics, string manipulatio, etc ...). Well get prepared for many more surprises with the internal C API of R. This is very tedious.
From time to time, I read the R-exts or R-ints manuals. This helps. But most of the time, when I re...
Pointers vs. values in parameters and return values
...mb for receivers is, "If in doubt, use a pointer."
Slices, maps, channels, strings, function values, and interface values are implemented with pointers internally, and a pointer to them is often redundant.
Elsewhere, use pointers for big structs or structs you'll have to change, and otherwise pass v...
How to determine whether an object has a given property in JavaScript
...he in operator.
if ('prop' in obj) {
// ...
}
Eg.:
var obj = {};
'toString' in obj == true; // inherited from Object.prototype
obj.hasOwnProperty('toString') == false; // doesn't contains it physically
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Set a path variable with spaces in the path in a Windows .cmd file or batch file
...
I use
set "VAR_NAME=<String With Spaces>"
when updating path:
set "PATH=%UTIL_DIR%;%PATH%"
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How do I check if I'm running on Windows in Python? [duplicate]
...s the system/OS name, e.g. 'Linux', 'Windows' or 'Java'.
An empty string is returned if the value cannot be determined.
If that isn't working, maybe try platform.win32_ver and if it doesn't raise an exception, you're on Windows; but I don't know if that's forward compatible to 64-bit, sin...