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postgresql COUNT(DISTINCT …) very slow
...ount int not null), using triggers. But your write performance will suffer and if you update multiple x values in single transaction then you'd need to do this in some explicit order to avoid possible deadlock.
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Find directory name with wildcard or similar to “like”
I am using the following command to find a directory name.
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Running code in main thread from another thread
In an android service I have created thread(s) for doing some background task.
16 Answers
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Set HTML5 doctype with XSLT
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This is the only standar way. But, with MSXSL, there is a non standar way: use empty xsl:output/@doctype-public and xsl:output/@doctype-system.
– user357812
Aug 2 '10 at 15:18
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Jackson JSON custom serialization for certain fields
... jsonGenerator.writeObject(tmpInt.toString());
}
}
Java should handle the autoboxing from int to Integer for you.
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See what has been installed via MacPorts
... postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9....
HTML table td meaning
In HTML table, what does td stands for? I mean literally, what is it acronym for? Table division? Table data?
8 Answers
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Adding a new array element to a JSON object
...arly delineates the boundaries between operating on the javascript objects and the JSON text representation of those objects. I think it is essential in understanding that once the JSON has been parsed, we are operating on pure javascript objects -- the fact that they originally came from JSON is i...
How can I launch Safari from an iPhone app?
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With iOS 10 we have one different method with completion handler:
ObjectiveC:
NSDictionary *options = [NSDictionary new];
//options can be empty
NSURL *url = [NSURL URLWithString:@"http://www.stackoverflow.com"];
[[UIApplication sharedApplication] openURL:url options:options compl...
Capture iframe load complete event
...Script for this:
const iframe = document.getElementById('iframe');
const handleLoad = () => console.log('loaded');
iframe.addEventListener('load', handleLoad, true)
And if you're interested in Observables this does the trick:
return Observable.fromEventPattern(
handler => iframe.addEven...