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How can I add new keys to a dictionary?
...gnoring the keys
Create a dictionary from two lists
data = dict(zip(list_with_keys, list_with_values))
New to Python 3.5
Creating a merged dictionary without modifying originals:
This uses a new featrue called dictionary unpacking.
data = {**data1, **data2, **data3}
New to Python 3.9...
How do I pass data between Activities in Android application?
...nt to allow the user to signout. Alternatively, you could store it in the Application object, but then you'd have to manage the state of the session (check if it's valid before using, etc).
– Erich Douglass
Jan 19 '10 at 15:16
...
How can I git stash a specific file?
...git stash push <path>. For example:
git stash push -m welcome_cart app/views/cart/welcome.thtml
OLD ANSWER:
You can do that using git stash --patch (or git stash -p) -- you'll enter interactive mode where you'll be presented with each hunk that was changed. Use n to skip the files that yo...
Adding information to an exception?
....message +
' happens at %s' % arg1), sys.exc_info()[2]
bar('arg1')
Traceback (most recent call last):
File "test.py", line 16, in <module>
bar('arg1')
File "test.py", line 11, in bar
foo()
File "test.py", line 5, in foo
raise IOError('Stuff...
PHP - include a php file and also send query parameters
...
Also note: $_GET will be the same for all included files. So if that is where your query parameters are stored, it will still see them. Also note: it is not the function, in a class.
– Jonathon
Apr...
Mongoose indexing in production code
...tra when you define (compile) your model. I do that when I first start the app. Now the hard think is to decide to drop all indexes and recreate them, in case you schema changes.
– Moss
Jul 31 '13 at 12:15
...
How to prevent gcc optimizing some statements in C?
...ode is portable to other compilers which don't understand GCC's #pragma or __attribute__ syntax.
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How do I get list of methods in a Python class?
...>> inspect.getmembers(OptionParser, predicate=inspect.ismethod)
[([('__init__', <unbound method OptionParser.__init__>),
...
('add_option', <unbound method OptionParser.add_option>),
('add_option_group', <unbound method OptionParser.add_option_group>),
('add_options', <...
What is the effect of extern “C” in C++?
...n it posted yet.
You'll very often see code in C headers like so:
#ifdef __cplusplus
extern "C" {
#endif
// all of your legacy C code here
#ifdef __cplusplus
}
#endif
What this accomplishes is that it allows you to use that C header file with your C++ code, because the macro "__cplusplus" will...
How to easily map c++ enums to strings
...::strings in the map)
For extra syntactic sugar, here's how to write a map_init class. The goal is to allow
std::map<MyEnum, const char*> MyMap;
map_init(MyMap)
(eValue1, "A")
(eValue2, "B")
(eValue3, "C")
;
The function template <typename T> map_init(T&) returns a ma...