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Postgresql: Conditionally unique constraint
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This note was removed from the docs in august 2015
– Raniz
Dec 18 '19 at 13:34
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Getting Java version at runtime
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What about getting the version from the package meta infos:
String version = Runtime.class.getPackage().getImplementationVersion();
Prints out something like:
1.7.0_13
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Javascript - remove an array item by value [duplicate]
...k at the question more carefully, it looks like he wants to remove a value from an array, not an index.
– Peter Olson
Aug 22 '11 at 3:31
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What does it mean to start a PHP function with an ampersand?
...t case, they're probably doing it to protect casual hackers, who use php4, from them selves. You shouldn't do this in your own code - It's deprecated.
– troelskn
Nov 4 '09 at 22:36
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Android OpenGL ES and 2D
... to build my augmented reality app using the simple techniques i'd learned from Ray's site and Erik's book. Thanks to them both for sharing!!!
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Blocks on Swift (animateWithDuration:animations:completion:)
...it is hiding slowly and when it is completely transparent; removes it self from parent view
ok variable will always returns true with animation termination.
alpha = 1
UIView.animate(withDuration: 0.5, animations: {
self.alpha = 0
}) { (ok) in
print("Ended \(ok)")
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How do browsers pause/change Javascript when tab or window is not active?
... does not matter whether the window is out of focus or not.
Edge
Starting from Edge 14, setInterval is capped at 1000ms in inactive tabs. requestAnimationFrame is always paused in inactive tabs.
Safari
Just like Chrome, Safari caps setInterval at 1000ms when the tab is inactive. requestAnimationFr...
CSS: How to have position:absolute div inside a position:relative div not be cropped by an overflow:
...ay to do this as-is. I think you might need to remove the overflow:hidden from div#1 and add another div within div#1 (ie as a sibling to div#2) to hold your unspecified 'content' and add the overflow:hidden to that instead. I don't think that overflow can be (or should be able to be) over-ridden.
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Add column with number of days between dates in DataFrame pandas
I want to subtract dates in 'A' from dates in 'B' and add a new column with the difference.
4 Answers
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What does the 'standalone' directive mean in XML?
... Markup declarations can affect the
content of the document, as passed
from an XML processor to an
application; examples are attribute
defaults and entity declarations. The
standalone document declaration, which
may appear as a component of the XML
declaration, signals whether or not
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