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How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...TE.
Quick explanation.
For usage see the manual - specifically the conflict_action clause in the syntax diagram, and the explanatory text.
Unlike the solutions for 9.4 and older that are given below, this feature works with multiple conflicting rows and it doesn't require exclusive locking or a retr...
AI2 Keep Awake
...application. Note: The extension does not work in the Companion. The WAKE_LOCK permission is missing there. You may be able to work around it by doing this: Patching the AI2 Companion - additional permissions . It is not guaranteed that the latest versions of the extensions are used in all examp...
What is std::move(), and when should it be used?
...ed, that's why it could be used on some non-copyable objects, like a unique_ptr). It's also possible for an object to take the content of a temporary object without doing a copy (and save a lot of time), with std::move.
This link really helped me out :
http://thbecker.net/articles/rvalue_referenc...
Entity Framework VS LINQ to SQL VS ADO.NET with stored procedures? [closed]
... the only one (NHibernate, ActiveRecord)
http://en.wikipedia.org/wiki/List_of_object-relational_mapping_software
to address the specific questions:
Depends on the quality of the O/RM solution, L2S is pretty good at generating SQL
This is normally much faster using an O/RM once you grok the proce...
Why shouldn't I use “Hungarian Notation”?
...d go away. For example, if you could say, strong typedef std::string unsafe_string; to introduce a new type unsafe_string that could not be converted to a std::string (and so could participate in overload resolution etc. etc.) then we would not need silly prefixes.
So, the central claim that Hungar...
What is your most productive shortcut with Vim?
... a language. The initial y is a verb. The statement yy is a synonym for y_. The y is doubled up to make it easier to type, since it is such a common operation.
This can also be expressed as dd P (delete the current line and paste a copy back into place; leaving a copy in the anonymous register as ...
In a storyboard, how do I make a custom cell for use with multiple controllers?
... bundle: nil), forCellReuseIdentifier: reuseIdentifier)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier:reuseIdentifier, for: indexPath) as! CustomCell
return cell!
}
...
What is the motivation for bringing Symbols to ES6?
... @SamarPanda, You might as well say that prefixing members with _ do not guarantee true privacy but can be used to separate public and internal properties of objects. In other words, pointless answer.
– Pacerier
Mar 22 '17 at 23:39
...
How do popular apps authenticate user requests from their mobile app to their server?
...wered Dec 23 '14 at 20:14
diyoda_diyoda_
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Load and execution sequence of a web page?
...and ready. Read more about it: http://docs.jquery.com/Tutorials:Introducing_$(document).ready()
Edit - This portion elaborates more on the parallel or not part:
By default, and from my current understanding, browser usually runs each page on 3 ways: HTML parser, Javascript/DOM, and CSS.
The HTML par...