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Creating an R dataframe row-by-row
...as you need
stringsAsFactors=FALSE) # you don't know levels yet
and then during your operations insert row at a time
DF[i, ] <- list(1.4, "foo")
That should work for arbitrary data.frame and be much more efficient. If you overshot N you can always shrink empty rows...
What is the best way to give a C# auto-property an initial value?
...ith C# 6 you can initialize auto-properties directly (finally!), there are now other answers in the thread that describe that.
C# 5 and below:
Though the intended use of the attribute is not to actually set the values of the properties, you can use reflection to always set them anyway...
public c...
How do I unload (reload) a Python module?
....4, in favour of importlib (thanks @Stefan!).
I think, therefore, you’d now use importlib.reload(module), although I’m not sure.
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How costly is .NET reflection?
... fear programmers who fear irrationally - it shows that they don't really know what they're doing and just basing what they do on what other people tell them. cough cargo cult cough
– bsneeze
May 2 '09 at 1:29
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How can I open multiple files using “with open” in Python?
...asks. No duplicate writing or failing to write. So I am really curious to know why my answer is considered to be wrong, suboptimal or anything like that.
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Check if any ancestor has a class using jQuery
...e. Parents loop was not break on first matched parent using closest(), but now it is. (don't know since which jq version but i'm pretty sure to be correct on this statement)
– A. Wolff
Mar 6 '14 at 21:26
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Get notified when UITableView has finished asking for data?
...the loading process before it ended. But Apple changed it at some point. Now the UITableView class can cache the reloadData call with all the row insert and delete calls. If you look at the @interface declaration for UITableView, you will find NSMutableArray member _reloadItems right under _inser...
How to make a .jar out from an Android Studio project
..., but no release folder. What version of the plugin are you using? Do you know if this is documented anywhere?
– Cameron Lowell Palmer
Apr 7 '17 at 14:01
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Profiling Django
...rofile logs on-the-fly, especially in production. I've used this technique now on several occasions because it has a light touch — no pesky middleware or third-party Django applications are required!
For example, to profile a particular view that seems to be running slow, you could crack open the...
How can I test an AngularJS service from the console?
...e $location service, but eventually i needed to wrap it in scope.apply. I know this is well documented, but it had slipped my mind. In one line angular.element(document).scope().$apply(angular.element(document).injector().get('$location').path('/my/angular/url'))
– acid_crucifi...