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How to implement common bash idioms in Python? [closed]
...te Linux command in the shell (with a few exceptions) forks a subprocess. By using Python shutil and os modules, you don't fork a subprocess.
The shell environment features. This includes stuff that sets a command's environment (current directory and environment variables and what-not). You can ...
When is a C++ destructor called?
...n address and allow you to perform operations on the objects they point to by specifically doing so.
2) Following up on question 1, what defines when an object goes out of scope (not regarding to when an object leaves a given {block}). So, in other words, when is a destructor called on an object...
Read a text file using Node.js?
... Awesome, thanks so much, very helpful. How could I split this data by line?
– fancy
Feb 6 '12 at 23:45
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Python dictionary from an object's fields
...()
>>> a.__dict__
{'c': 2, 'b': 1}
A better approach (suggested by robert in comments) is the builtin vars function:
>>> vars(a)
{'c': 2, 'b': 1}
Alternatively, depending on what you want to do, it might be nice to inherit from dict. Then your class is already a dictionary, an...
Can you define aliases for imported modules in Python?
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If you've done:
import long_module_name
you can also give it an alias by:
lmn = long_module_name
There's no reason to do it this way in code, but I sometimes find it useful in the interactive interpreter.
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When should I use a trailing slash in my URL?
...sidered hierarchical, with the components of the hierarchy being separated by "/".
Source: Wikipedia Uniform Resource Locator (URL)
Also:
That is the question we hear often. Onward to the answers! Historically, it’s common for URLs with a trailing slash to indicate a directory, and those wi...
When to use SELECT … FOR UPDATE?
... solve this problem, Thread 1 should SELECT id FROM rooms FOR UPDATE, thereby preventing Thread 2 from deleting from rooms until Thread 1 is done. Is that correct?
This depends on the concurrency control your database system is using.
MyISAM in MySQL (and several other old systems) does lock the...
Capistrano - clean up old releases
... set the callback for "deploy:cleanup" as I said below, since it don't run by default.
– Diego Plentz
May 31 '12 at 0:39
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How do I reference an existing branch from an issue in GitHub?
...It seems that directly (as in user/repo/branch) is not possible, but maybe by using the id of the tree?
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Determine project root from a running node.js application
...le. That means that you can determine whether a file has been run directly by testing require.main === module
Because module provides a filename property (normally equivalent to __filename), the entry point of the current application can be obtained by checking require.main.filename.
So if yo...