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How to define object in array in Mongoose schema correctly with 2d geo index
...ay , "default" : [] }
In the second case during insertion make the object and push it into the array like
db.update({'Searching criteria goes here'},
{
$push : {
trk : {
"lat": 50.3293714,
"lng": 6.9389939
} //inserted data is the object to be inserted
...
Including one C source file in another?
...mplex, performance critical subsystem with a fairly small public interface and a lot of non-reusable implementation code. The code runs to several thousand lines, a hundred or so private functions and quite a bit of private data. If you work with non-trivial embedded systems, you probably deal with ...
What is the meaning of addToBackStack with null parameter?
...ction is saved to the
back stack so the user can reverse the transaction and bring back the
previous fragment by pressing the Back button.
If you add multiple changes to the transaction (such as another add()
or remove()) and call addToBackStack(), then all changes applied
before you ca...
What is the use of Enumerable.Zip extension method in Linq?
...ative. B) Write a method to yield return each element of the shorter list, and then continue yield returning default indefinitely thereafter. (Option B requires you to know in advance which list is shorter.)
– jpaugh
Jul 7 '17 at 21:41
...
Difference between map and collect in Ruby?
I have Googled this and got patchy / contradictory opinions - is there actually any difference between doing a map and doing a collect on an array in Ruby/Rails?
...
Associativity of “in” in Python?
I'm making a Python parser, and this is really confusing me:
4 Answers
4
...
What is string_view?
...
The purpose of any and all kinds of "string reference" and "array reference" proposals is to avoid copying data which is already owned somewhere else and of which only a non-mutating view is required. The string_view in question is one such pro...
What is the default form HTTP method?
...8n, %events --
action %URI; #REQUIRED -- server-side form handler --
method (GET|POST) GET -- HTTP method used to submit the form--
enctype %ContentType; "application/x-www-form-urlencoded"
accept %ContentTypes; #IMPLIED -- list of MIME types for file ...
Why should I avoid std::enable_if in function signatures
Scott Meyers posted content and status of his next book EC++11.
He wrote that one item in the book could be "Avoid std::enable_if in function signatures" .
...
Relative imports in Python 2.7
... is that there is a big difference between directly running a Python file, and importing that file from somewhere else. Just knowing what directory a file is in does not determine what package Python thinks it is in. That depends, additionally, on how you load the file into Python (by running or b...