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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
...
Why is creating a Thread said to be expensive?
...a fair bit of work involved:
A large block of memory has to be allocated and initialized for the thread stack.
System calls need to be made to create / register the native thread with the host OS.
Descriptors need to be created, initialized and added to JVM-internal data structures.
It is also e...
Specifying an Index (Non-Unique Key) Using JPA
...il because there are literally millions of queries on this field per day, and its a bit slow without the key.
11 Answers
...
Fixed position but relative to container
...on. It is now possible to center content of an dynamic size (horizontally and vertically) with the help of the magic of CSS3 transform. The same principle applies, but instead of using margin to offset your container, you can use translateX(-50%). This doesn't work with the above margin trick bec...
How can I rename a project folder from within Visual Studio?
... the extra steps required.
To rename a project's folder, file (.*proj) and display name in Visual Studio:
Close the solution.
Rename the folder(s) outside Visual Studio. (Rename in TFS if using source control)
Open the solution, ignoring the warnings (answer "no" if asked to load a project fro...
How to use 'find' to search for files created on a specific date? [closed]
How do I use the UNIX command find to search for files created on a specific date?
9 Answers
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ModelState.IsValid == false, why?
...
About "can it be that 0 errors and IsValid == false": here's MVC source code from https://github.com/Microsoft/referencesource/blob/master/System.Web/ModelBinding/ModelStateDictionary.cs#L37-L41
public bool IsValid {
get {
return Values.All(mo...
Argparse optional positional arguments?
...arguments:
dir
optional arguments:
-h, --help show this help message and exit
-v
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Change the selected value of a drop-down list with jQuery
...s:
[jQuery.val] checks, or selects, all the radio buttons, checkboxes, and select options that match the set of values.
This behavior is in jQuery versions 1.2 and above.
You most likely want this:
$("._statusDDL").val('2');
...
Putting an if-elif-else statement on one line?
...itting everything on one line would most likely violate PEP-8 where it is mandated that lines should not exceed 80 characters in length.
It's also against the Zen of Python: "Readability counts". (Type import this at the Python prompt to read the whole thing).
You can use a ternary expression in P...