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Can someone explain __all__ in Python?
...xplicitly mentioned here, is exactly when __all__ is used. It is a list of strings defining what symbols in a module will be exported when from <module> import * is used on the module.
For example, the following code in a foo.py explicitly exports the symbols bar and baz:
__all__ = ['bar', '...
Should arrays be used in C++?
..." },
// ...
};
This is often preferable to using a vector (and std::string), since it
avoids all order of initialization issues; the data is pre-loaded,
before any actual code can be executed.
Finally, related to the above, the compiler can calculate the actual
size of the array from the init...
How do I print the type or class of a variable in Swift?
...below to the new Swift 2.0 syntax (e.g. println was replaced with print, toString() is now String()).
From the Xcode 6.3 release notes:
@nschum points out in the comments that the Xcode 6.3 release notes show another way:
Type values now print as the full demangled type name when used with
p...
How to use enums in C++
...es themselves don't have members. What you wrote is the equivalent to std::string.clear. std::string is a type, so you can't use . on it. You use . on an instance of a class.
Unfortunately, enums are magical and so the analogy stops there. Because with a class, you can do std::string::clear to g...
Django: Redirect to previous page after login
...
Actually this is not a good idea, you will find the query string very very long if you have too many clicks
– dspjm
Jun 21 '14 at 12:31
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Remove unwanted parts from strings in a column
I am looking for an efficient way to remove unwanted parts from strings in a DataFrame column.
9 Answers
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ios Upload Image and Text using HTTP POST
...onary* _params = [[NSMutableDictionary alloc] init];
[_params setObject:[NSString stringWithString:@"1.0"] forKey:[NSString stringWithString:@"ver"]];
[_params setObject:[NSString stringWithString:@"en"] forKey:[NSString stringWithString:@"lan"]];
[_params setObject:[NSString stringWithFormat:@"%d",...
Setting a property by reflection with a string value
...e to set a property of an object through Reflection, with a value of type string .
So, for instance, suppose I have a Ship class, with a property of Latitude , which is a double .
...
What is the use of static variable in C#? When to use it? Why can't I declare the static variable in
...ross all of them. Thus, at any given point of time, there will be only one string value contained in the permanent variable.
Since there is only one copy of the variable available for all instances, the code this.permament will result in compilation errors because it can be recalled that this.vari...
Python's json module, converts int dictionary keys to strings
... python's json module (included since 2.6) converts int dictionary keys to strings.
9 Answers
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