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What is the most accurate way to retrieve a user's correct IP address in PHP?
I know there are a plethora of $_SERVER variables headers available for IP address retrieval. I was wondering if there is a general consensus as to how to most accurately retrieve a user's real IP address (well knowing no method is perfect) using said variables?
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Transposing a NumPy array
... just used np.arange to quickly make a 1D array. It works exactly the same for a = np.array([5,4]).
– Joe Kington
May 10 '11 at 18:45
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How to avoid isset() and empty()
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For those interested, I have expanded this topic into a small article, which provides the below information in a somewhat better structured form: The Definitive Guide To PHP's isset And empty
IMHO you should think about no...
Checking if form has been submitted - PHP
What is the best way of checking whether or not a form has been submitted to determine whether I should pass the form's variables to my validation class?
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How to open, read, and write from serial port in C?
....c_cflag & ~CSIZE) | CS8; // 8-bit chars
// disable IGNBRK for mismatched speed tests; otherwise receive break
// as \000 chars
tty.c_iflag &= ~IGNBRK; // disable break processing
tty.c_lflag = 0; // no signaling chars, no echo,
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Convert from List into IEnumerable format
How shall I do in order to convert _Book_List into IEnumerable format?
6 Answers
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How to check if all elements of a list matches a condition?
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The best answer here is to use all(), which is the builtin for this situation. We combine this with a generator expression to produce the result you want cleanly and efficiently. For example:
>>> items = [[1, 2, 0], [1, 2, 0], [1, 2, 0]]
>>> all(flag == 0 for (_, _...
Why do you have to call .items() when iterating over a dictionary in Python?
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For every python container C, the expectation is that
for item in C:
assert item in C
will pass just fine -- wouldn't you find it astonishing if one sense of in (the loop clause) had a completely different meaning from...
Selecting multiple columns in a pandas dataframe
...can sometimes alter the original object. Always good to be on the look out for this.
df1 = df.iloc[0, 0:2].copy() # To avoid the case where changing df1 also changes df
To use iloc, you need to know the column positions (or indices). As the column positions may change, instead of hard-coding indice...
Fitting empirical distribution to theoretical ones with Scipy (Python)?
... values in the list are not necessarily in order, but order doesn't matter for this problem.
9 Answers
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