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Executing periodic actions in Python [duplicate]
... One thing to watch out for here is start time "drift". I just ran a test and my times drifted by +0.05s in about 33 iterations. I was running 1 second polls, and this means a drift of 20% in less than a minute. You can reduce drift by calling the threading.Timer at the start of the function r...
What is the best method to merge two PHP objects?
...j1, (array) $obj2);
This actually also works when objects have methods. (tested with PHP 5.3 and 5.6)
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Retrieve the commit log for a specific line in a file?
...1c7 git-browse-help.sh (Christian Couder 2007-12-02 06:07:55 +0100 159) test "$vers" -lt 2 && NEWTAB=''
a0685a4f git-web--browse.sh (Dmitry Potapov 2008-02-09 23:22:22 -0800 160) "$browser_path" $NEWTAB "$@" &
And you want to know the history of what is now line 155.
Then, use...
Is there a reason for C#'s reuse of the variable in a foreach?
...reaking change scenario though, which is that someone writes code in C# 5, tests it, and then shares it with people who are still using C# 4, who then naively believe it to be correct. Hopefully the number of people affected by such a scenario is small.
– Eric Lippert
...
How can I use PowerShell with the Visual Studio Command Prompt?
...Files (x86)\Microsoft Visual Studio $($VS_VERSION[$version])\VC"
if (!(Test-Path (Join-Path $targetDir "vcvarsall.bat"))) {
"Error: Visual Studio $version not installed"
return
}
pushd $targetDir
cmd /c "vcvarsall.bat&set" |
foreach {
if ($_ -match "(.*?...
What is the fastest way to compare two sets in Java?
...n this set. But if all elements are present in both sets, it will need to test all of them.
The worst case performance therefore occurs when the two sets are equal but not the same objects. That cost is typically O(N) or O(NlogN) depending on the implementation of this.containsAll(c).
And you ge...
How to split a long regular expression into multiple lines in JavaScript?
...,
{big
,smelly
}
}
Note the successful capturing of the quoted string.
I tested it on Chrome and Firefox, works a treat!
If curious you can checkout what I was doing, and its demonstration.
Though it only works on Chrome, because Firefox doesn't support backreferences or named groups. So note the...
How to prevent ifelse() from turning Date objects into numeric objects
...or of the same length and attributes (including dimensions and "class") as test and data values from the values of yes or no. The mode of the answer will be coerced from logical to accommodate first any values taken from yes and then any values taken from no.
Boiled down to its implications, ifels...
How to get the Display Name Attribute of an Enum member via MVC razor code?
...
In GetDisplayValue you should first test descriptionAttributes == null before you try to access the array: descriptionAttributes[0]. Otherwise you may raise an exception and the line below where you check for null will never be true.
– Rob...
Why is MATLAB so fast in matrix multiplication?
...Algebra Subprograms (BLAS). Engineers could then call these standard, well-tested BLAS routines in their code, making their work much easier.
BLAS:
BLAS evolved from level 1 (the first version which defined scalar-vector and vector-vector operations) to level 2 (vector-matrix operations) to level ...