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How do I get user IP address in django?
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def get_client_ip(request):
m>x m>_forwarded_for = request.META.get('HTTP_m>X m>_FORWARDED_FOR')
if m>x m>_forwarded_for:
ip = m>x m>_forwarded_for.split(',')[0]
else:
ip = request.META.get('REMOTE_ADDR')
return ip
Make sure you have reverse p...
Why isn't `int pow(int base, int em>x m>ponent)` in the standard C++ libraries?
...e C++ pow function does not implement the "power" function for anything em>x m>cept float s and double s?
11 Answers
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Why are preprocessor macros evil and what are the alternatives?
...fect tool.
There are a few aspects to macros that make them "bad" (I'll em>x m>pand on each later, and suggest alternatives):
You can not debug macros.
Macro em>x m>pansion can lead to strange side effects.
Macros have no "namespace", so if you have a macro that clashes with a name used elsewhere, you ge...
Plot two graphs in same plot in R
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lines() or points() will add to the em>x m>isting graph, but will not create a new window. So you'd need to do
plot(m>x m>,y1,type="l",col="red")
lines(m>x m>,y2,col="green")
share
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Find an element in a list of tuples
...each tuple is 2: you can convert your list into a single dictionary.
For em>x m>ample,
test = [("hi", 1), ("there", 2)]
test = dict(test)
print test["hi"] # prints 1
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improve this answer
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Why is `std::move` named `std::move`?
The C++11 std::move(m>x m>) function doesn't really move anything at all. It is just a cast to r-value. Why was this done? Isn't this misleading?
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Why are regular em>x m>pressions so controversial? [closed]
When em>x m>ploring regular em>x m>pressions (otherwise known as RegEm>x m>-es), there are many individuals who seem to see regular em>x m>pressions as the Holy Grail. Something that looks so complicated - just must be the answer to any question. They tend to think that every problem is solvable using regular em>x m>press...
Understanding the map function
...omprehensions instead:
map(f, iterable)
is basically equivalent to:
[f(m>x m>) for m>x m> in iterable]
map on its own can't do a Cartesian product, because the length of its output list is always the same as its input list. You can trivially do a Cartesian product with a list comprehension though:
[(a,...
How to remove ASP.Net MVC Default HTTP Headers?
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m>X m>-Powered-By is a custom header in IIS. Since IIS 7, you can remove it by adding the following to your web.config:
<system.webServer>
<httpProtocol>
<customHeaders>
<remove name="m>X m>-Powered-By...
Passing an integer by reference in Python
...nd is to pass the integer in a container which can be mutated:
def change(m>x m>):
m>x m>[0] = 3
m>x m> = [1]
change(m>x m>)
print m>x m>
This is ugly/clumsy at best, but you're not going to do any better in Python. The reason is because in Python, assignment (=) takes whatever object is the result of the right hand...