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Can I concatenate multiple MySQL rows into one field?
...d in their comment, you can also sort the values before imploding it using ORDER BY:
SELECT person_id, GROUP_CONCAT(hobbies ORDER BY hobbies ASC SEPARATOR ', ')
FROM peoples_hobbies
GROUP BY person_id;
As Dag stated in his comment, there is a 1024 byte limit on the result. To solve this, run this q...
How to completely uninstall Visual Studio 2010?
... is a utility that runs the uninstallers for you, one by one, in the right order; but all that's going to do is save you time, and really, how often do you need to uninstall Visual Studio?
– Harry Johnston
Sep 26 '12 at 1:53
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Postgresql GROUP_CONCAT equivalent?
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Note that the syntax also allows you to specify the order of values in the string (or array, using array_agg) e.g. string_agg(some_column, ',' ORDER BY some_column) or even string_agg(surname || ', ' || forename, '; ' ORDER BY surname, forename)
– IMSoP
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Sass or Compass without ruby?
...f (sass & compass) IS written in Ruby. So you'll definitely need it in order to run it.
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What's the use of ob_start() in php?
... I assume output buffering has to be enabled in the .ini file order to call ob_start(); Is this correct? What happens if it isn't enabled?
– Kevin Wheeler
Aug 14 '15 at 3:48
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原子vector的一种实现源码(atomic-vector) - C/C++ - 清泛网 - 专注C/C++及内核技术
...cting\n",
typeName(), this);
delete m_next.load(std::memory_order_relaxed);
}
template<typename Value>
void AtomicVector<Value>::ensureSize(size_t size) {
FTRACE(2, "{}::ensureSize({}), m_size = {}\n",
typeName(), size, m_size);
if (m_size >= size) return;
au...
Disable mouse scroll wheel zoom on embedded Google Maps
... This is a great solution. In my case, I had to specify a z-index in order for it to overlay correctly, though.
– RCNeil
Apr 17 '14 at 14:23
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lodash multi-column sortBy descending
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As of lodash 3.5.0 you can use sortByOrder (renamed orderBy in v4.3.0):
var data = _.sortByOrder(array_of_objects, ['type','name'], [true, false]);
Since version 3.10.0 you can even use standard semantics for ordering (asc, desc):
var data = _.sortByOrder(ar...
Repository Pattern vs DAL
...cts are grouped into aggregates, each with an aggregate root. E.g. PurchaseOrder is an aggregate root and OrderItems are children within the aggregate root. A repository only deals with aggregate roots. That is, a OrderItem for example is never loaded independently of it's aggreate root. So, you wou...
Accessing items in an collections.OrderedDict by index
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If its an OrderedDict() you can easily access the elements by indexing by getting the tuples of (key,value) pairs as follows
>>> import collections
>>> d = collections.OrderedDict()
>>> d['foo'] = 'python'
&...