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Sorting a Python list by two fields
...For example, the columns to be used as keys are all strings that cannot be converted to numbers. Secondly, one wants to sort in ascending order by one column and descending order by another column.
– coder.in.me
Sep 25 '16 at 9:00
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Copy table without copying data
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How could you convert show create table bar into a dynamically executable statement?
– Pacerier
Feb 2 '15 at 12:23
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Extracting substrings in Go
...-sequence.
Here's a UTF-8-aware version:
func substr(input string, start int, length int) string {
asRunes := []rune(input)
if start >= len(asRunes) {
return ""
}
if start+length > len(asRunes) {
length = len(asRunes) - start
}
return string(asRunes...
Terminating a script in PowerShell
... via CLI e.g. powershell -command "& module-function ...". I needed to convert those functions to throw to a wrapping try-catch and exit from that wrapping catch in order to actually output an error exit code.
– Josh
Mar 16 '16 at 14:37
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Logging framework incompatibility
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Just for interest of anyone else following: I ended up with a red arrow in the dependency graph because even the latest logback-core insists on slf4j-1.6.0. It took some more diddling around with versions until all the red arrows disa...
How do I return multiple values from a function? [closed]
...a similar builtin example.
>>> import collections
>>> Point = collections.namedtuple('Point', ['x', 'y'])
>>> p = Point(1, y=2)
>>> p.x, p.y
1 2
>>> p[0], p[1]
1 2
In recent versions of Python 3 (3.6+, I think), the new typing library got the NamedTupl...
What is the native keyword in Java for?
...icate that the method is implemented in native code using JNI (Java Native Interface).
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Nesting await in Parallel.ForEach
...ix” that by blocking the ForEach() threads, but that defeats the whole point of async-await.
What you could do is to use TPL Dataflow instead of Parallel.ForEach(), which supports asynchronous Tasks well.
Specifically, your code could be written using a TransformBlock that transforms each id int...
LaTeX: Prevent line break in a span of text
...at the point of the command. With the
optional argument, number, you can convert the \nolinebreak command
from a demand to a request. The number must be a number from 0 to 4.
The higher the number, the more insistent the request is.
Source: http://www.personal.ceu.hu/tex/breaking.htm#nolineb...
SQL WHERE.. IN clause multiple columns
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While this would work, it converts the uncorrelated query in the question into a correlated query. Unless the query optimizer is clever, this might give you O(n^2) performance :-(. But maybe I'm underestimating the optimizer...
–...