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Add missing dates to pandas dataframe
My data can have multiple events on a given date or NO events on a date. I take these events, get a count by date and plot them. However, when I plot them, my two series don't always match.
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Why is XOR the default way to combine hashes?
Say you have two hashes H(A) and H(B) and you want to combine them. I've read that a good way to combine two hashes is to XOR them, e.g. XOR( H(A), H(B) ) .
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When to use cla(), clf() or close() for clearing a plot in matplotlib?
Matplotlib offers there functions:
3 Answers
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Optional query string parameters in ASP.NET Web API
I need to implement the following WebAPI method:
5 Answers
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Change values while iterating
...t is not possible.
The reason for this is that range copies the values from the slice you're iterating over.
The specification about range says:
Range expression 1st value 2nd value (if 2nd variable is present)
array or slice a [n]E, *[n]E, or []E index ...
updating table rows in postgres using subquery
Using postgres 8.4, My goal is to update existing table:
6 Answers
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Linq to Entities join vs groupjoin
I have web searched but I still cant find a simple answer. Can someone please explain (in simple English) what a GroupJoin is? How is it different from a regular inner Join ? Is it commonly used? Is it only for method syntax? What about query syntax? A c# code example would be nice.
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What is the difference between CascadeType.REMOVE and orphanRemoval in JPA?
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From here:-
Cascading Remove
Marking a reference field with CascadeType.REMOVE (or CascadeType.ALL,
which includes REMOVE) indicates that remove operations should be
cascaded automatically to entity objects that are...
How do I execute inserts and updates in an Alembic upgrade script?
I need to alter data during an Alembic upgrade.
3 Answers
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Which is generally best to use — StringComparison.OrdinalIgnoreCase or StringComparison.InvariantCul
I have some code like this:
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