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How to turn NaN from parseInt into 0 for an empty string?
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var s = '';
var num = parseInt(s) || 0;
When not used with boolean values, the logical OR (||) operator returns the first expression (parseInt(s)) if it can be evaluated to true, otherwise it returns the second expression (0). The return value of par...
Function Pointers in Java
...s a concept of delegates, which relates strongly to the idea of function pointers from C++. Is there a similar functionality in Java? Given that pointers are somewhat absent, what is the best way about this? And to be clear, we're talking first class here.
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What does $_ mean in PowerShell?
...llowing examples:
PowerShell:
1,2,3 | ForEach-Object {Write-Host $_}
Prints:
1
2
3
or
1,2,3 | Where-Object {$_ -gt 1}
Prints:
2
3
And compare this with C# syntax using LINQ:
var list = new List<int> { 1, 2, 3 };
list.ForEach( _ => Console.WriteLine( _ ));
Prints:
1
2
3
or...
How to use getJSON, sending data with post method?
...0" is the callback GET value.
In PHP the implementation would be like:
print_r($_GET['callback']."(".json_encode($myarr).");");
I made some cross-domain tests and it seems to work. Still need more testing though.
share
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How to stop an animation (cancel() does not work)
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Hi again! I have found a way to get point (in terms of interpolated time) when animation was canceled. You need to make Animation sub-class and put there code from android code animation (e.g. TranslateAnimation). In your class you will be able to save and track ...
Java 8: Lambda-Streams, Filter by Method with Exception
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propagate here receives java.util.concurrent.Callable as a parameter and converts any exception caught during the call into RuntimeException. There is a similar conversion method Throwables#propagate(Throwable) in Guava.
This method seems being essential for lambda method chaining, so I hope one ...
UIButton won't go to Aspect Fit in iPhone
...u manage button states with this technique? Seems like responding to user interaction like "highlighted" would be a nightmare.
– SooDesuNe
Oct 24 '12 at 2:30
3
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How to check whether a variable is a class or not?
...thon 3 simplifies this to isinstance(object, type). Note that objects like int, list, str, etc. are also classes, so you can't use this to distinguish between custom classes defined in Python and built-in classes defined in C code.
– Martijn Pieters♦
Jan 6 '1...
SQL Server SELECT LAST N Rows
...ill requires a table scan, no? (And I don't think it answers what the OP points to as a better phrased dupe of their question: ie, without sorting)
– ruffin
Apr 5 '16 at 15:07
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How to check if APK is signed or “debug build”?
...if package is signed with debug key without hardcoding debug key signature into our code.
Given:
import android.content.pm.Signature;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
You can implement an isDebuggable method this way:
private static fina...