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Regex, every non-alphanumeric character except white space or colon
...r exactly what is discussed in these answers. I don't care about character sets that will not be used in my application. Law of diminishing returns.
– user3842449
Jun 15 '16 at 13:16
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How to quickly edit values in table in SQL Server Management Studio?
... > Options. In the tree on the left, select SQL Server Object Explorer. Set the option "Value for Edit Top Rows command" to 0. It'll now allow you to view and edit the entire table from the context menu.
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How to use GROUP_CONCAT in a CONCAT in MySQL
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See this explained here SQL Fiddle Demo (scroll down as it has two result sets)
Edit There was a mistake in reading question, I had grouped only by id. But two group_contacts are needed if (Values are to be concatenated grouped by Name and id and then over all by id). Previous answer was
select
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PHP expects T_PAAMAYIM_NEKUDOTAYIM?
...t could represent a value which is meant to be changed by a user - like DB settings or some true / false values and other value types which the code developer don't know at design-time. This is common for APIs or code frameworks. I just don't understand why the developers of the Zend parser didn't u...
The definitive guide to form-based website authentication [closed]
...iven the perceived (though now avoidable) cost and technical difficulty of setting up an SSL certificate on your website, some developers are tempted to roll their own in-browser hashing or encryption schemes in order to avoid passing cleartext logins over an unsecured wire.
While this is a noble th...
How does HashSet compare elements for equality?
... specify a different one on construction).
When you add an element to the set, it will find the hash code using IEqualityComparer<T>.GetHashCode, and store both the hash code and the element (after checking whether the element is already in the set, of course).
To look an element up, it will...
Understanding Fragment's setRetainInstance(boolean)
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As far as I can tell, if you have setRetainInstance(true), the Fragment java object, and all its contents are not destroyed on rotation, but the view is recreated. That is onCreatedView() is called again. It's basically the way it should have worked with Acti...
The case against checked exceptions
For a number of years now I have been unable to get a decent answer to the following question: why are some developers so against checked exceptions? I have had numerous conversations, read things on blogs, read what Bruce Eckel had to say (the first person I saw speak out against them).
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What's the difference between backtracking and depth first search?
... of DFS. Moreover, keeping track of visited nodes for a very large problem set could be really memory intensive; calling for a careful design of get_all_immediate_neighbors (or algorithms that can handle revisiting a node without getting into infinite loop).
[1] Stuart Russell and Peter Norvig, Art...
Which C++ idioms are deprecated in C++11?
With the new standard, there are new ways of doing things, and many are nicer than the old ways, but the old way is still fine. It's also clear that the new standard doesn't officially deprecate very much, for backward compatibility reasons. So the question that remains is:
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