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Sorting arrays in NumPy by column
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You can sort on multiple columns as per Steve Tjoa's method by using a stable sort like mergesort and sorting the indices from the least significant to the most significant columns:
a = a[a[:,2].argsort()] # First sort doesn't need to be stable.
a = a[a[:,1].argsort(kind='mergesort')]
a = a[a[:,...
Is there any advantage of using map over unordered_map in case of trivial keys?
...f course) when using unordered_map instead of map in a main entity look-up table.
On the other hand, I found it was much slower at repeatedly inserting and removing elements. It's great for a relatively static collection of elements, but if you're doing tons of insertions and deletions the hashing ...
Is there a MySQL command to convert a string to lowercase?
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UPDATE table SET colname=LOWER(colname);
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Get Specific Columns Using “With()” Function in Laravel Eloquent
I have two tables, User and Post . One User can have many posts and one post belongs to only one user .
13 Answe...
Margin while printing html page
...tyle will not adjust the margin in the printer driver that defines the printable area of the printer, or margin controlled by the browser (may be adjustable in print preview on some browsers)... It will just set margin on the document inside the printable area.
You should also be aware that IE7++ ...
XAMPP - MySQL shutdown unexpectedly
...course, destroy all the data which was stored in that file (all the InnoDB tables which were created before setting innodb_file_per_table to enabled). The methods suggested in the log message seem suprtior to me.
– Tgr
Oct 12 '13 at 10:50
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is there a post render callback for Angular JS directive?
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Humm, try something like: <table id="bob"><tbody dashboard-table="#bob"></tbody></table> Then in your link, do $(attrs.dashboardTable).dataTable() to make sure it's being selected right. Or I guess you already tried that.. I'm real...
How to check if a stored procedure exists before creating it
...ything after AS:
BEGIN
DECLARE @myvar INT
SELECT *
FROM mytable
WHERE @myvar ...
END
This code does exactly same things a stored proc would do, but is not stored on the database side.
That's much like what is called anonymous procedure in PL/SQL.
Update:
Your question tit...
Remove columns from dataframe where ALL values are NA
... function to reduce the size. The answer bellow using Filter or using data.table will help your memory usage.
– mtelesha
Dec 9 '15 at 15:21
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Convert sqlalchemy row object to python dict
...andas dataframe) then {col.name: getattr(self, col.name) for col in self.__table__.columns} as answered by Anurag Uniyal (with important corrections from comments to that answer) seems both more succinct and error-proof.
– kilgoretrout
Jul 30 '16 at 20:44
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