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Retrieving the last record in each group - MySQL
There is a table messages that contains data as shown below:
27 Answers
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Best algorithm for detecting cycles in a directed graph [closed]
What is the most efficient algorithm for detecting all cycles within a directed graph?
14 Answers
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Disabling swap files creation in vim
Is there a way to disable .swp files creation in vim? or at least create them all in one place so I can find and delete them easily.
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What are metaclasses in Python?
In Python, what are metaclasses and what do we use them for?
22 Answers
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In plain English, what does “git reset” do?
I have seen interesting posts explaining subtleties about git reset .
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Python: print a generator expression?
In the Python shell, if I enter a list comprehension such as:
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Explicitly calling return in a function or not
...ot rebuked by Simon Urbanek from the R core team (I believe) for recommending a user to explicitly calling return at the end of a function (his comment was deleted though):
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Working with time DURATION, not time of day
I'm doing some benchmarking, and I want to use Excel to produce graphs of the results. I've got a simple but annoying problem which is baking my noodle.
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What's the best practice for primary keys in tables?
When designing tables, I've developed a habit of having one column that is unique and that I make the primary key. This is achieved in three ways depending on requirements:
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What is the most efficient way of finding all the factors of a number in Python?
Can someone explain to me an efficient way of finding all the factors of a number in Python (2.7)?
22 Answers
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