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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...
What's the best practice for putting multiple projects in a git repository? [closed]
...e to error) to dump an unwanted directory than to remove unwanted files by selecting each of them.
Branch names can include '/' characters
So you might want to name your branches something like
project1/master
project1/featureABC
project2/master
project2/featureXYZ
...
How do I include a file over 2 directories back?
...
.. selects the parent directory from the current. Of course, this can be chained:
../../index.php
This would be two directories up.
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XSLT equivalent for JSON [closed]
...ompact and intuitive notation.
11. JSONPath Plus
Analyse, transform, and selectively extract data from JSON documents (and JavaScript objects).
jsonpath-plus expands on the original specification to add some additional operators and makes explicit some behaviors the original did not spell out.
12...
Easiest way to toggle 2 classes in jQuery
... match the elements that expose either class, you can use a multiple class selector and write:
$(".A, .B").toggleClass("A B");
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How do I view the SQLite database on an Android device? [duplicate]
..., type .tables. This will give you all the tables in the database.db file.
select * from table1;
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How to change the order of DataFrame columns?
...mean(1))
http://pandas.pydata.org/pandas-docs/stable/dsintro.html#column-selection-addition-deletion
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How to use mysql JOIN without ON condition?
...oins-mysql-database/
You can use 'USING' instead of 'ON' as in the query
SELECT * FROM table1 LEFT JOIN table2 USING (id);
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Epoch vs Iteration when training neural networks
...ining instances into subsets (i.e., batches), performing one pass over the selected subset (i.e., batch), and then optimizing the network through backpropagation. The number o
emacs create new file with ido enabled
...switch to the traditional mode are all useful.
Also, when ido has already selected an alternate file path, you can hit C-z to return where you were and temporarily disable that behavior.
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