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Difference between numpy.array shape (R, 1) and (R,)
In numpy , some of the operations return in shape (R, 1) but some return (R,) . This will make matrix multiplication more tedious since explicit reshape is required. For example, given a matrix M , if we want to do numpy.dot(M[:,0], numpy.ones((1, R))) where R is the number of rows (of co...
How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?
Which of them are preferred in which circumstances?
7 Answers
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Algorithm to generate a crossword
Given a list of words, how would you go about arranging them into a crossword grid?
13 Answers
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Can someone copyright a SQL query? [closed]
I work for a school district. Every year we have to export a list of students from our student management system and send it to a company that handles our online exams.
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What's the difference between a proc and a lambda in Ruby?
And when would you use one rather than the other?
8 Answers
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Remove all spaces from a string in SQL Server
What is the best way to remove all spaces from a string in SQL Server 2008?
23 Answers
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Calling C++ class methods via a function pointer
How do I obtain a function pointer for a class member function, and later call that member function with a specific object? I’d like to write:
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Difference between clustered and nonclustered index [duplicate]
I need to add proper index to my tables and need some help.
6 Answers
6
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How do I use itertools.groupby()?
I haven't been able to find an understandable explanation of how to actually use Python's itertools.groupby() function. What I'm trying to do is this:
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Can a foreign key be NULL and/or duplicate?
Please clarify two things for me:
11 Answers
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