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correct way to define class variables in Python [duplicate]
..._elem
999 456
>>> print c2.static_elem, c2.object_elem
999 456
# Now, let's try changing the object element
c1.object_elem = 888
>>> print c1.static_elem, c1.object_elem
999 888
>>> print c2.static_elem, c2.object_elem
999 456
As you can see, when we changed the class ...
Search for executable files using find command
...ric questions, it is sufficient to use the POSIX-compliant -perm primary (known as a test in GNU find terminology).
-perm allows you to test for any file permissions, not just executability.
Permissions are specified as either octal or symbolic modes. Octal modes are octal numbers (e.g., 111), whe...
Why are functions in Ocaml/F# not recursive by default?
...ble to accidentally invoke the wrong "version" of a function. And there is now a discrepancy between implicitly-recursive fun-bound functions and non-recursive val-bound functions.
Haskell makes it possible to infer the dependencies between definitions by restricting them to be pure. This makes toy...
What's the idiomatic syntax for prepending to a short python list?
...icient, because in Python, a list is an array of pointers, and Python must now take every pointer in the list and move it down by one to insert the pointer to your object in the first slot, so this is really only efficient for rather short lists, as you ask.
Here's a snippet from the CPython source...
How do you specify the Java compiler version in a pom.xml file?
...
This is now the first method on the Maven documentation page that @mkobit gave. Much nicer, and you don't have to pin the version of the compiler plugin.
– Danila Piatov
Feb 19 '18 at 18:49
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Why do this() and super() have to be the first statement in a constructor?
...
Considering the compiler knows when you're accessing parent methods/fields I don't see why you can't be allowed something along the lines of Constructor(int x) { this.field1 = x; super(); }. Sure, you shouldn't need to in an ideal world where you cont...
Proper way to implement IXmlSerializable?
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@MarcGravell I know this is an old thread. "The framework writes a wrapper element and positions the XML writer after its start." This is where I am struggling. Is there a way to force the framework skip this step of automatically handling t...
Memory footprint of Haskell data types
...ords, and a Due takes 3.
The Int type is defined as
data Int = I# Int#
now, Int# takes one word, so Int takes 2 in total. Most unboxed types take one word, the exceptions being Int64#, Word64#, and Double# (on a 32-bit machine) which take 2. GHC actually has a cache of small values of type Int...
setuptools vs. distutils: why is distutils still a thing?
...used in many cases with some popular legacy programs. And as you probably know changing these sorts of things in legacy programs can be quite a pain and come with quite a few problems, for example incompatibilities, which would then lead to the developer having to rewrite the source code. So there i...
What is the explicit promise construction antipattern and how do I avoid it?
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The deferred antipattern (now explicit-construction anti-pattern) coined by Esailija is a common anti-pattern people who are new to promises make, I've made it myself when I first used promises. The problem with the above code is that is fails to util...