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On localhost, how do I pick a free port number?
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How do you match only valid roman numerals with a regular expression?
...s (requires at least one Roman numeral letter). Should work in PCRE, Perl, Python and Ruby.
Online Ruby demo: http://rubular.com/r/KLPR1zq3Hj
Online Conversion: http://www.onlineconversion.com/roman_numerals_advanced.htm
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How to check whether an object has certain method/property?
... commonplace pattern in pretty much any modern dynamic scripting language (Python, Javascript, VB script, PHP, Lua... I could go on and on). It's not a bug, it's a feature.
– Tim Keating
Dec 3 '11 at 14:36
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Does SQLAlchemy have an equivalent of Django's get_or_create?
...e updated using a {} as a default value in the function as this is typical Python gotcha. Thanks for the comment, Nigel! If your curious about this gotcha, check out this StackOverflow question and this blog post.
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How to unit test an object with database queries
...however I'm sure you could perhaps get something similar working under PHP/Python.
Hope this helps.
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Why do some claim that Java's implementation of generics is bad?
...re plenty of examples of large, successful systems built in languages like Python and Ruby that do exactly what I suggested in my answer.
– Clint Miller
Feb 7 '09 at 15:14
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What killed my process and why?
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Use dmesg to see kernel log: here I find my python processes killed by kernel due to extreme virtual memory consumption.
– caneta
Aug 28 '13 at 7:43
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How to search for occurrences of more than one space between words in a line
...ces, you can use this and replace it with a single space
\s+
example in python
result = re.sub('\s+',' ', data))
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Are braces necessary in one-line statements in JavaScript?
...'ve never found it useful to do this "recommended" thing. I've never coded python, so I don't just insert things and expect the indentation to matter. If I add a statement, I also add braces. Always. Can't remember a single time it bit me. Not in C, not in C# not in JavaScript.
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What is AF_INET, and why do I need it?
...tion. AF stands for Address Family.
As in BSD standard Socket (adopted in Python socket module) addresses are represented as follows:
A single string is used for the AF_UNIX/AF_LOCAL address family. This option is used for IPC on local machines where no IP address is required.
A pair (host, port)...