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What are database normal forms and can you give examples? [closed]
...is the most basic of normal forms - each cell in a table must contain only one piece of information, and there can be no duplicate rows.
2NF and 3NF are all about being dependent on the primary key. Recall that a primary key can be made up of multiple columns. As Chris said in his response:
The da...
Best practices for API versioning? [closed]
... debugging a API client that works with the the new API version. Such versioned APIs should be time-limited and available to limited groups of API users (like during closed betas) only. Otherwise, you commit yourself where you shouldn't.
A couple of thoughts regarding maintenance of API versions th...
Wrapping a C library in Python: C, Cython or ctypes?
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ctypes is your best bet for getting it done quickly, and it's a pleasure to work with as you're still writing Python!
I recently wrapped an FTDI driver for communicating with a USB chip using ctypes and it was great. I had it all done and working in less than one...
Is gcc's __attribute__((packed)) / #pragma pack unsafe?
...er is properly aligned. With an array of two struct foo objects, at least one or the other will have a misaligned x member.)
(In this case, p0 points to a misaligned address, because it points to a packed int member following a char member. p1 happens to be correctly aligned, since it points to th...
What are the dark corners of Vim your mom never told you about? [closed]
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Might not be one that 99% of Vim users don't know about, but it's something I use daily and that any Linux+Vim poweruser must know.
Basic command, yet extremely useful.
:w !sudo tee %
I often forget to sudo before editing a file I do...
How to drop a list of rows from Pandas dataframe?
...e.drop and pass it a Series of index labels:
In [65]: df
Out[65]:
one two
one 1 4
two 2 3
three 3 2
four 4 1
In [66]: df.drop(df.index[[1,3]])
Out[66]:
one two
one 1 4
three 3 2
...
Where can I find the “clamp” function in .NET?
...gt; would output NaN and using NaN for min or max would effectively make a one-sided clamp. With CompareTo it would always return NaN if max is NaN.
– Herman
Mar 18 '14 at 10:12
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Print in one line dynamically
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By the way...... How to refresh it every time so it print mi in one place just change the number.
In general, the way to do that is with terminal control codes. This is a particularly simple case, for which you only need one special character: U+000D CARRIAGE RETURN, which is written '...
Should one use < or
...ust too unfamiliar. It also risks going into a very, very long loop if someone accidentally increments i during the loop.
– Jon Skeet
Apr 2 '09 at 10:22
5
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How can I get file extensions with JavaScript?
... hidden, I believe) kind of files too. That is if you want to keep it as a one-liner, which is a bit messy to my taste.
– kooker
Jun 21 '14 at 4:00
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