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Is it Pythonic to use list comprehensions for just side effects?
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It is very anti-Pythonic to do so, and any seasoned Pythonista will give you hell over it. The intermediate list is thrown away after it is created, and it could potentially be very, very large, and therefore expensive to create.
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Error “initializer element is not constant” when trying to initialize variable with const
...n error on line 6 (initialize my_foo to foo_init) of the following program and I'm not sure I understand why.
5 Answers
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How to name variables on the fly?
...I save in mypackage/data. Each one in its file with same name for the file and the data in it (given R recommendations for data in package). Each dataset is about 10M and the total is ~ 17Go I hardly see an other way.
– cmbarbu
Feb 16 '16 at 11:19
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Common MySQL fields and their appropriate data types
...g up a very small MySQL database that stores, first name, last name, email and phone number and am struggling to find the 'perfect' datatype for each field. I know there is no such thing as a perfect answer, but there must be some sort of common convention for commonly used fields such as these. For...
How is set() implemented?
...ython source code for set which, according to Achim Domma, is mostly a cut-and-paste from the dict implementation.
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Print array to a file
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How can you ONLY save the contents of the array and not the entire array "[0] => blah"??
– user1899415
Aug 22 '13 at 5:38
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Rotating a two-dimensional array in Python
... answered Dec 7 '11 at 19:43
Andrew ClarkAndrew Clark
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How to access maven.build.timestamp for resource filtering
I am using maven 3.0.4 and would like to make the build timestamp accessible to my application. For this, I'm putting a placeholder in a .properties file and let maven filter on build. While this is working fine for ${project.version} , ${maven.build.timestamp} is not substituted on filtering. ...
JavaScript inheritance: Object.create vs new
...like
function SomeBaseClass(){
this.publicProperty='SomeValue';
}
and if you use it like
var obj=new MyClass();
console.log(obj.publicProperty); // undefined
console.log(obj);
The obj object won't have publicProperty property like in this example.
Your second example
MyClass.prot...
How can I dynamically create derived classes from a base class
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This bit of code allows you to create new classes with dynamic
names and parameter names.
The parameter verification in __init__ just does not allow
unknown parameters, if you need other verifications, like
type, or that they are mandatory, just add the logic
there:
class BaseClass(object):...