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Unique ways to use the Null Coalescing operator [closed]
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Well, first of all, it's much easier to chain than the standard ternary:
string anybody = parm1 ?? localDefault ?? globalDefault;
vs.
string anyboby = (parm1 != null) ? parm1
: ((localDefault != null) ? localDefault
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autolayout - make height of view relative to half superview height
...seems like a really trivial problem example. I have a view that I want to sit at the top of the screen, and take up half of the screen-height. Simple before autolayout - just tack it in place and tell it to expand vertically when the superview resizes.
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Get encoding of a file in Windows
... tool (Windows 7) to get the current encoding of a text file? Sure I can write a little C# app but I wanted to know if there is something already built in?
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How do I find the install time and date of Windows?
This might sound like a little bit of a crazy question, but how can I find out (hopefully via an API/registry key) the install time and date of Windows?
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To ARC or not to ARC? What are the pros and cons? [closed]
I've yet to use ARC, since the majority of the code in the project I'm working on at the moment was written pre-iOS 5.0.
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How to run a Runnable thread in Android at defined intervals?
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handler.postDelayed(r, 1000);
Or we can use normal thread for example (with original Runner) :
Thread thread = new Thread() {
@Override
public void run() {
try {
while(true) {
sleep(1000);
handler.post(this);
}
} cat...
Set the maximum character length of a UITextField
How can I set the maximum amount of characters in a UITextField on the iPhone SDK when I load up a UIView ?
44 Answers
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Adding placeholder text to textbox
I am looking for a way to add placeholder text to a textbox like you can with a textbox in html5.
24 Answers
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How does C compute sin() and other math functions?
...e that actually runs when you call sin() on a typical x86-64 Linux system. It is apparently faster than the fsin assembly instruction. Source code: sysdeps/ieee754/dbl-64/s_sin.c, look for __sin (double x).
This code is very complex. No one software algorithm is as fast as possible and also accurat...
Multiple aggregations of the same column using pandas GroupBy.agg()
...ferent aggregating functions f1, f2 to the same column df["returns"] , without having to call agg() multiple times?
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