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multiprocessing.Pool: When to use apply, apply_async or map?
I have not seen clear examples with use-cases for Pool.apply , Pool.apply_async and Pool.map . I am mainly using Pool.map ; what are the advantages of others?
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Determine command line working directory when running node bin script
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@reergymerej You'll probably want to store cwd first before executing chdir() (e.g., var originalCwd = process.cwd(); then execute your process.chdir(), and you can return to the original afterwards).
– Swivel
Aug 16 '16 at 21:11
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Python constructor and default value [duplicate]
...alse (e.g. False, 0, "", {}, (), objects that specify __nonzero__()). The former is specific: None is the only special object that triggers defaulting to []. The latter will replace any false-y object with [].
– Josh Bleecher Snyder
Oct 2 '12 at 17:37
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Behaviour of increment and decrement operators in Python
... want to do:
count += 1
I suspect the ++ and -- operators were left out for consistency and simplicity. I don't know the exact argument Guido van Rossum gave for the decision, but I can imagine a few arguments:
Simpler parsing. Technically, parsing ++count is ambiguous, as it could be +, +, cou...
Reload django object from database
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@fcracker79 Yeah, it was only implemented in 1.8. For earlier versions of Django you're best going with one of the other answers.
– Tim Fletcher
Aug 25 '15 at 15:46
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What's “wrong” with C++ wchar_t and wstrings? What are some alternatives to wide characters?
... Type wchar_t is a distinct type whose values can represent distinct codes for all members of the largest extended character set specified among the supported locales (22.3.1).
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C# Sanitize File Name
...em.IO.Path.GetInvalidFileNameChars() ) );
string invalidRegStr = string.Format( @"([{0}]*\.+$)|([{0}]+)", invalidChars );
return System.Text.RegularExpressions.Regex.Replace( name, invalidRegStr, "_" );
}
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Regular expression to find URLs within a string
...nd URLs within a string? I've found a lot of regular expressions on Google for determining if an entire string is a URL but I need to be able to search an entire string for URLs. For example, I would like to be able to find www.google.com and http://yahoo.com in the following string:
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Split a string by a delimiter in python
...en the first example (simply using split()) and the second example (with a for loop)?
– EndenDragon
Jun 26 '16 at 18:21
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How can I add new keys to a dictionary?
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>>> x.update(d)
>>> print(x)
{1: 2, 3: 4, 5: 6, 7: 8}
For adding a single key, the accepted answer has less computational overhead.
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