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What is this weird colon-member (“ : ”) syntax in the constructor?
... the exceptions listed at the end of the FAQ entry).
The takeaway point from the FAQ entry is that,
All other things being equal, your code will run faster if you use initialization lists rather than assignment.
sha...
Handling Touch Event in UILabel and hooking it up to an IBAction
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UILabel inherits from UIView which inherits from UIResponder. All UIresponder objects can handle touch events. So in your class file which knows about your view (which contains the UIlabel) implement:
-(void)touchesBegan:(NSSet*)touches wit...
How do I detect unsigned integer multiply overflow?
...tegers mod 2^32 (or 2^64). The distinction between overflow as a deviation from mathematical infinite-sized integer behaviour, and overflow as an undefined behaviour in the language seems rarely to be made explicit.
– Chris Johnson
Oct 3 '09 at 18:47
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What's the difference of “./configure” option “--build”, “--host” and “--target”?
... debugger/compiler was also built by the powerpc? This is a comment I got from another user (Ned): build = where am I compiling the compiler, host = where the compiler will run, target = what code will the compiler produce. Reference: stackoverflow.com/questions/7088576/…
– ...
pretty-print JSON using JavaScript
...is great if you have an object you want pretty printed. If you're starting from a valid JSON string that you want to pretty printed, you need to convert it to an object first:
var jsonString = '{"some":"json"}';
var jsonPretty = JSON.stringify(JSON.parse(jsonString),null,2);
This builds a JSON ...
Difference between shadowing and overriding in C#?
...en by a sub-class and calls to that method even on the super-class type or from inside code of the super-class will call the replacement implementation from the sub-class.
Then a concrete method is shown (one not marked as virtual or abstract) being hidden by using the new keyword when defining a m...
Why do I want to avoid non-default constructors in fragments?
....
The callbacks like onCreate or onCreateView should read the parameters from the bundle - this way you are guaranteed to restore the state of the fragment correctly to the same state the fragment was initialised with (note this state can be different from the onSaveInstanceState bundle that is pa...
Plot a legend outside of the plotting area in base graphics?
...erior of the plot cover the entire device. new=TRUE is needed to prevent R from starting a new device. We can then add the empty plot:
plot(0, 0, type='n', bty='n', xaxt='n', yaxt='n')
And we are ready to add the legend:
legend("bottomright", ...)
will add a legend to the bottom right of the d...
Execute Python script via crontab
...esn't changes anything,
First, you should redirect both stdin and stderr from crontab execution like below:
*/2 * * * * /usr/bin/python /home/souza/Documets/Listener/listener.py > /tmp/listener.log 2>&1
then you can view the file /tmp/listener.log to see if the script executed as you ...
PHP: How to remove all non printable characters in a string?
... you just want the 7 bit printable ASCII chars, you can rip out everything from 0-31 and 127-255 with this:
$string = preg_replace('/[\x00-\x1F\x7F-\xFF]/', '', $string);
It matches anything in range 0-31, 127-255 and removes it.
8 bit extended ASCII?
You fell into a Hot Tub Time Machine, and ...