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Why are trailing commas allowed in a list?
...
s = ['manny',
'mo',
'jack'
'roger' # Added this line, but forgot to add a comma on the previous line
]
and triggering implicit string literal concatenation, producing s = ['manny', 'mo', 'jackroger'] instead of the intended result.
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What 'sensitive information' could be disclosed when setting JsonRequestBehavior to AllowGet
..., due to bugs in old versions of browsers (e.g. Firefox 3), it is possible for JavaScript prototype objects to be redefined and make it possible for www.evil.com to read your data returned by your method. This is known as JSON Hijacking.
See this post for some methods of preventing this. However, i...
How to make git-diff and git log ignore new and deleted files?
... built into git.
I'll leave this answer here since it might provide ideas for things that aren't built into git.
git diff shows new and deleted files by comparing them to /dev/null. It shouldn't be too difficult to write something (I'd use Perl myself) that looks for /dev/null and filters out t...
Express.js - app.listen vs server.listen
...ing an app using Express.js and starting the app listening on port 1234, for example:
5 Answers
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Unicode, UTF, ASCII, ANSI format differences
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Going down your list:
"Unicode" isn't an encoding, although unfortunately, a lot of documentation imprecisely uses it to refer to whichever Unicode encoding that particular system uses by default. On Windows and Java, this often means UTF-16; in many other places, it means UTF-8. Prop...
What does Class mean in Java?
... any type (? is a wildcard). The Class type is a type that contains meta-information about a class.
It's always good practice to refer to a generic type by specifying his specific type, by using Class<?> you're respecting this practice (you're aware of Class to be parameterizable) but you're...
How do I enable TODO/FIXME/XXX task tags in Eclipse?
...something that is disabled by default because I have been using those tags for as long as I've been using Eclipse and I have never seen one of them appear in the task list. Can anyone indicate how to enable this feature? I see no preferences option anywhere that says anything to the effect of 'Let m...
++someVariable vs. someVariable++ in JavaScript
In JavaScript you can use ++ operator before ( pre-increment ) or after the variable name ( post-increment ). What, if any, are the differences between these ways of incrementing a variable?
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e.printStackTrace equivalent in python
...e the current exception. See http://docs.python.org/library/traceback.html for more information.
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ASP.NET MVC: Is Controller created for every request?
Very simple question: Are controllers in ASP.NET created for every HTTP request, or are they created at application startup and reused throughout requests?
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