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Python: most idiomatic way to convert None to empty string?
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If you actually want your function to behave like the str() built-in, but return an empty string when the argument is None, do this:
def xstr(s):
if s is None:
return ''
return str(s)
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Defining static const integer members in class definition
...ot a definition.
http://publib.boulder.ibm.com/infocenter/comphelp/v8v101/index.jsp?topic=/com.ibm.xlcpp8a.doc/language/ref/cplr038.htm
Interestingly, if I comment out the call to std::min, the code compiles and links just fine (even though test::N is also referenced on the previous line).
Any id...
I want to remove double quotes from a String
..., I'm using substr to cut off those first and last chars. Strings are zero-indexed, so the last char is the charAt(str.length -1). substr expects 2 arguments, where the first is the offset from which the substring starts, the second is its length. Since we don't want the last char, anymore than we w...
How to change a django QueryDict to Python Dict?
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In Django 1.8 on Python 3 all I needed was dict(queryDict).
– fmalina
May 15 '15 at 19:16
1
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Error to run Android Studio
I have installed Android Studio and I followed all steps described here
17 Answers
17...
Dynamically adding a form to a Django formset with Ajax
I want to automatically add new forms to a Django formset using Ajax, so that when the user clicks an "add" button it runs JavaScript that adds a new form (which is part of the formset) to the page.
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C++11 reverse range-based for-loop
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Actually Boost does have such adaptor: boost::adaptors::reverse.
#include <list>
#include <iostream>
#include <boost/range/adaptor/reversed.hpp>
int main()
{
std::list<int> x { 2, 3, 5, 7, 11, 13, 1...
List of standard lengths for database fields
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[N]Varchar sizes do however, affect your indexes.
– RBarryYoung
Nov 7 '13 at 22:37
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How to determine a user's IP address in node
...de of the package request-ip at github.com/pbojinov/request-ip/blob/master/index.js it checks x-forwarded-for and all sorts of other headers for popular load balancers like AWS ELB, Cloudflare, Akamai, nginx, Rackspace LB and Riverbed's Stingray
– Giorgio
Oct 1...
In Django - Model Inheritance - Does it allow you to override a parent model's attribute?
...ld instances (at least,
not at the moment). If a base class has a field called author, you
cannot create another model field called author in any class that
inherits from that base class.
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