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What is the “owning side” in an ORM mapping?
...ow what is the owning side, and update the correct side of the relation in order to trigger the persistence of the new relation in the database.
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Is it possible to use global variables in Rust?
...is possible to have statics that require code to be executed at runtime in order to be initialized. This includes anything requiring heap allocations, like vectors or hash maps, as well as anything that requires function calls to be computed.
// Declares a lazily evaluated constant HashMap. The Has...
How to implement custom JsonConverter in JSON.NET to deserialize a List of base class objects?
... to work how to generate the correct type (Person or Employee), because in order to determine this you need to analyse the JSON and there is no built in way to do this using the Create method.
I found a discussion thread pertaining to type conversion and it turned out to provide the answer. Here is...
PHP + curl, HTTP POST sample code?
...
Be aware that you should encode your data in order for it to be submitted safely.
– wtf8_decode
Jan 16 '15 at 17:45
3
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mongodb group values by multiple fields
...lf-join" with another pipeline expression, in which we can apply $limit in order to return the "top-n" results.
db.books.aggregate([
{ "$group": {
"_id": "$addr",
"count": { "$sum": 1 }
}},
{ "$sort": { "count": -1 } },
{ "$limit": 2 },
{ "$lookup": {
"from": "books",
"let"...
Why would I ever use push_back instead of emplace_back?
...ncluding the version that ship with Visual Studio 2012, 2013 and 2015.
In order to accommodate known compiler bugs, prefer usingstd::vector::push_back() if the parameters reference iterators or other objects which will be invalid after the call.
std::vector<int> v;
v.emplace_back(123);
v.emp...
How to use if-else option in JSTL
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Framework vs. Toolkit vs. Library [duplicate]
...amework embodies some abstract
design, with more behavior built in.
In order to use it you need to insert
your behavior into various places in
the framework either by subclassing or
by plugging in your own classes. The
framework's code then calls your code
at these points.
To summari...
How can I use Autolayout to set constraints on my UIScrollview?
..., Command click both the content view and the scroll view's parent view in order to select them both. Then set the heights to be equal (Control drag from the Content View to the Scroll View). This is also key. Because we are scrolling horizontally, the scroll view's content view won't know how high ...
difference between width auto and width 100 percent
...al space within its containing block. If it has any horizontal padding or border, the widths of those do not add to the total width of the element.
Width 100%
On the other hand, if you specify width:100%, the element’s total width will be 100% of its containing block plus any horizontal mar...