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In Python, what happens when you import inside of a function? [duplicate]
... "appropriate scope" be module-level means each use of goo.this, goo.that, etc, is two dict lookups -- one for goo and one for the attribute name. Having it be "function level" pays one extra local-variable setting per run of the function (even faster than the dictionary lookup part!) but saves one...
What is getattr() exactly and how do I use it?
...mple you have an object person, that has several attributes: name, gender, etc.
You access these attributes (be it methods or data objects) usually writing: person.name, person.gender, person.the_method(), etc.
But what if you don't know the attribute's name at the time you write the program? For ...
Find the files that have been changed in last 24 hours
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Why is the Java main method static?
...when we have to bridge the virtual machine world, and the world of C, C++, etc... The reverse is also true - it is not possible (at least to my knowledge) to actually get a JVM running without using JNI.
Basically, java.exe is a super simple C application that parses the command line, creates a n...
Why do most C developers use define instead of const? [duplicate]
...== x, but if SCALE is an (extern) const, it will need to generate code to fetch the value and perform the multiplication because the value will not be known until the linking stage. (extern is needed to use the constant from several source files.)
A closer equivalent to using #define is using enume...
Difference between __getattr__ vs __getattribute__
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"In order to avoid infinite recursion in this method, its implementation should always call the base class method with the same name to access any attributes it needs, for example, object.__getattribute__(self, name)."
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Can a local variable's memory be accessed outside its scope?
... be dead before the first method's local variables are dead. The relative order of the beginnings and endings of lifetimes of storages associated with local variables can be worked out ahead of time.
For this reason, local variables are usually generated as storage on a "stack" data structure, bec...
Loading and parsing a JSON file with multiple JSON objects
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(How) can I count the items in an enum?
...ainerClass *m_containers[Folders_MAX + 1];
....
m_containers[FA] = ...; // etc.
Edit: Regarding { FA, FB, FC, Folders_MAX = FC} versus {FA, FB, FC, Folders_MAX]: I prefer setting the ...MAX value to the last legal value of the enum for a few reasons:
The constant's name is technically more accur...
Is mongodb running?
...| grep mongo | grep -v grep # "ps" flags may differ on your OS
or
/etc/init.d/mongodb status # for MongoDB version < 2.6
/etc/init.d/mongod status # for MongoDB version >= 2.6
or
service mongod status
to see if mongod is running (you need to be root to do this, or...