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How can I select rows with most recent timestamp for each key value?
...group by sensorID).
– Arjan
Jul 28 '16 at 7:03
I think "LEFT JOIN" is applied as well, not only "INNER JOIN"; and a pa...
Prevent errors from breaking / crashing gulp watch
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Your swallowError function should look like this:
function swallowError (error) {
// If you want details of the error in the console
console.log(error.toString())
this.emit('end')
}
I think you have to bind this function ...
Why should I declare a virtual destructor for an abstract class in C++?
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edited Aug 19 '16 at 10:37
Daniel Kamil Kozar
15k44 gold badges4040 silver badges6060 bronze badges
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Pure virtual function with implementation
...e type can still define an implementation. A derived class can explicitly call the base class implementation (if access permissions allow it) by using a fully-scoped name (by calling A::f() in your example - if A::f() were public or protected). Something like:
class B : public A {
virtual voi...
What is Rack middleware?
...tages of processing a request - separation of concerns being a key goal of all well designed software products.
For example with Rack I can have separate stages of the pipeline doing:
Authentication: when the request arrives, are the users logon details correct? How do I validate this OAuth, HTTP...
Is it possible to change only the alpha of a rgba background colour on hover?
...s/Script/…
– Arian Acosta
Aug 12 '16 at 2:08
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Is a memory leak created if a MemoryStream in .NET is not closed?
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16
The using block calls dispose for you.
– Nick
Oct 24 '08 at 15:52
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Extract a dplyr tbl column as a vector
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This seems the most versatile method as it works identically with vectors and data.frames, i.e. it enables functions to be more agnostic.
– geotheory
Mar 14 '17 at 10:03
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How do I URL encode a string
...om/message/15674#15674
http://simonwoodside.com/weblog/2009/4/22/how_to_really_url_encode/
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How do I match any character across multiple lines in a regular expression?
...P it is:
/(.*)<FooBar>/s
The s at the end causes the dot to match all characters including newlines.
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