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Django database query: How to get object by id?
Django automatically creates an id field as primary key.
6 Answers
6
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Realistic usage of the C99 'restrict' keyword?
...aw it mentioned. I read a brief description, stating that it would be basically a promise from the programmer that the pointer won't be used to point somewhere else.
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Add line break to 'git commit -m' from the command line
...$'first line\nsecond line'
From the Bash manual:
Words of the form $'string' are treated specially. The word expands to
string, with backslash-escaped characters replaced as specified by the
ANSI C standard.
This includes support for newlines as shown above, plus hex and Unicode codes an...
Accessing private member variables from prototype-defined functions
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No, there's no way to do it. That would essentially be scoping in reverse.
Methods defined inside the constructor have access to private variables because all functions have access to the scope in which they were defined.
Methods defined on a prototype are not defin...
Suppressing deprecated warnings in Xcode
With all the SDKs floating around, it's handy to be able to build for multiple SDKs and platforms. However, bouncing from 3.2 to 3.0 and even occasionally 2.x, I frequently get deprecated warnings involving methods that have changed or been superseded:
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How to use base class's constructors and assignment operator in C++?
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You can explicitly call constructors and assignment operators:
class Base {
//...
public:
Base(const Base&) { /*...*/ }
Base& operator=(const Base&) { /*...*/ }
};
class Derived : public Base
{
int additional_;
public:
...
How to determine whether code is running in DEBUG / RELEASE build?
...EBUG changed to another variable name such as DEBUG_MODE.
then conditionally code for DEBUG in your source files
#ifdef DEBUG
// Something to log your sensitive data here
#else
//
#endif
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How do I calculate a point on a circle’s circumference?
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@Dean No need for extra brackets because of the operator precedence. When you have + and * like in those two equations and without any brackets you always go for the * first and then for the +.
– rbaleksandar
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vs. . Which to use?
...couple of bugs related to the
width of buttons. It'll mysteriously
add extra padding when you're trying
to add styles, meaning you have to add
a tiny hack to get things under
control.
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How to enable local network users to access my WAMP sites?
... by default.
Now you should edit the \wamp\bin\apache\apache{version}\conf\extra\httpd-vhosts.conf file. In WAMPServer3.0.6 and above there is actually a menu that will open this file in your editor
left click wampmanager -> Apache -> httpd-vhost.conf
just like the one that has always existse...