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Postgresql GROUP_CONCAT equivalent?
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This is probably a good starting point (version 8.4+ only):
SELECT id_field, array_agg(value_field1), array_agg(value_field2)
FROM data_table
GROUP BY id_field
array_agg returns an array, but you can CAST that to text and edit as needed (see clarifications, below).
Prior...
How do you divide each element in a list by an int?
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The idiomatic way would be to use list comprehension:
myList = [10,20,30,40,50,60,70,80,90]
myInt = 10
newList = [x / myInt for x in myList]
or, if you need to maintain the reference to the original list:
myList[:] = [x / myInt for x in myList]
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Pretty-print C++ STL containers
... const char_type *_delim;
bool _insertDelim;
};
#if _MSC_VER >= 1400
// Declare pretty_ostream_iterator as checked
template<typename T, typename TChar, typename TCharTraits>
struct std::_Is_checked_helper<pretty_ostream_iterator<T, TChar, TCharTraits> > : public std::tr1...
How can I select an element with multiple classes in jQuery?
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answered Jun 24 '09 at 22:30
Sasha ChedygovSasha Chedygov
110k2525 gold badges9797 silver badges108108 bronze badges
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How is AngularJS different from jQuery
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414
While Angular 1 was a framework, Angular 2 is a platform. (ref)
To developers, Angular2 pro...
How do I stop Chrome from yellowing my site's input boxes?
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74
I know in Firefox you can use the attribute autocomplete="off" to disable the autocomplete funct...
How can I truncate a double to only two decimal places in Java?
For example I have the variable 3.545555555, which I would want to truncate to just 3.54.
15 Answers
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Multi-line tooltips in Java?
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148
If you wrap the tooltip in <html> and </html> tags, you can break lines with <br...
Questions every good .NET developer should be able to answer? [closed]
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answered Dec 13 '08 at 18:41
JulietJuliet
75.2k4343 gold badges190190 silver badges224224 bronze badges
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Prevent unit tests but allow integration tests in Maven
...tifactId>maven-surefire-plugin</artifactId>
<version>2.14</version>
<configuration>
<!-- skips surefire tests without skipping failsafe tests.
Property value seems to magically default to false -->
<skipTests>${skip.sure...