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How do I create a unique constraint that also allows nulls?
...te with GUIDs. However, my data contains null values for this columns. How do I create the constraint that allows multiple null values?
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How long should SQL email fields be? [duplicate]
...to be arbitrary. However, I was wondering what the "standard" is? How long do you guys make it? (same question for Name field...)
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Measure and Benchmark Time for Ruby Methods
...n by the method and the time taken for database access and redis access. I do not want to write Benchmark.measure before every statement. Does the ruby interpreter gives us any hooks for doing this ?
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Pandas DataFrame column to list [duplicate]
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Output:
[1, 3, 5, 7, 4, 5, 6, 4, 7, 8, 9]
To drop duplicates you can do one of the following:
>>> df['a'].drop_duplicates().to_list()
[1, 3, 5, 7, 4, 6, 8, 9]
>>> list(set(df['a'])) # as pointed out by EdChum
[1, 3, 4, 5, 6, 7, 8, 9]
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IEnumerable vs List - What to Use? How do they work?
I have some doubts over how Enumerators work, and LINQ. Consider these two simple selects:
10 Answers
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How do I decompile a .NET EXE into readable C# source code?
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Lucas: Out of the box, I have not seen reflector able to do this. FileDisassembler has always been the only way. This may have changed in recent history though I guess. I will check it out.
– GEOCHET
Oct 8 '08 at 11:49
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How to use if - else structure in a batch file?
...ut I couldn't use "if - else" blocks safely so these parts of my programme doesn't work. How can I do make these parts run? Thank you.
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Post data to JsonP
Is it possible to post data to JsonP? Or does all data have to be passed in the querystring as a GET request?
7 Answers
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What's the difference between window.location= and window.location.replace()?
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window.location adds an item to your history in that you can (or should be able to) click "Back" and go back to the current page.
window.location.replace replaces the current history item so you can't go back to it.
See window...
How do I disable form resizing for users? [duplicate]
How do I disable form resizing for users? Which property is used?
7 Answers
7
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