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How do you query for “is not null” in Mongo?
..., the query returns only the documents that do not contain the field.
$ne selects the documents where the value of the field is not equal to the specified value. This includes documents that do not contain the field.
So in your provided case following query going to return all the documents with i...
Entity Framework Join 3 Tables
...equals t.TID
where e.OwnerID == user.UID
select new {
UID = e.OwnerID,
TID = e.TID,
Title = t.Title,
EID = e.EID
}).Take(10);
And you should probably add orderby c...
jQuery scroll() detect when user stops scrolling
...ndler. It attaches an event handler function for one or more events to the selected elements and calls the handler function if the event was not triggered for a given interval. This is useful if you want to fire a callback only after a delay, like the resize event, or such.
It is important to check...
Force “git push” to overwrite remote files
...
Since this is the selected answer, I will comment here. Using force isn't a problem when working by yourself. For example, my cloud host starts with it's own git. If I work locally and build a project, and I want to put it on my cloud host (Op...
Android - Using Custom Font
...ory. The New
Resource Directory window appears.
In the Resource type list, select font, and then click OK.
Add your font files in the font folder.The folder structure below generates R.font.dancing_script, R.font.la_la, and R.font.ba_ba.
Double-click a font file to preview the file's fonts in the ed...
What are the differences between Deferred, Promise and Future in JavaScript?
...
These answers, including the selected answer, are good for introducing promises
conceptually, but lacking in specifics of what exactly the differences are in
the terminology that arises when using libraries implementing them (and there
are important diff...
Formatting text in a TextBlock
... <LineBreak></LineBreak>
<Run Text="To Begin, select" FontStyle="Italic"></Run>
<Run x:Name="InstructionSection" Text="'REPLACED AT RUNTIME'" FontWeight="Bold"></Run>
<Run Text="from the menu." FontStyle="Italic"></Run>
...
What scalability problems have you encountered using a NoSQL data store? [closed]
...ent CACM paper contrasting Vertica with map-reduce.
Update: And Twitter's selected Cassandra over several others, including HBase, Voldemort, MongoDB, MemcacheDB, Redis, and HyperTable.
Update 2: Rick Cattell has just published a comparison of several NoSQL systems in High Performance Data Stores....
How to extract the decision rules from scikit-learn decision-tree?
... recursive partitioning. There is nothing preventing a variable from being selected multiple times.
– Zelazny7
Mar 1 '17 at 17:25
...
Configuration With Same Name Already Exists
...n the table, Click the dropdown in the Platform column for the project and select , to add a new platform.
Click OK.
Repeat adding new platforms as needed.
Save the project.
Return the previously moved solution file back to where it was.
Reopen the combined project solution.
sour...