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What is the difference between old style and new style classes in Python?

...(x) is always <type 'instance'>. This reflects the fact that all old-style instances, independently of their class, are implemented with a single built-in type, called instance. New-style classes were introduced in Python 2.2 to unify the concepts of class and type. A new-s...
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Replacing spaces with underscores in JavaScript?

...e to replace spaces with _, it works for the first space in the string but all the other instances of spaces remain unchanged. Anybody know why? ...
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How do you do relative time in Rails?

...e_ago_in_words method (or distance_of_time_in_words), from ActiveSupport. Call it like this: <%= time_ago_in_words(timestamp) %> share | improve this answer | follow ...
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Is it possible to forward-declare a function in Python?

...rwards is impossible, what about defining it in some other module? Technically you still define it first, but it's clean. You could create a recursion like the following: def foo(): bar() def bar(): foo() Python's functions are anonymous just like values are anonymous, yet they can be ...
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How do I expire a PHP session after 30 minutes?

...ms with filesystems where atime tracking is not available. So it additionally might occur that a session data file is deleted while the session itself is still considered as valid because the session data was not updated recently. And second: session.cookie_lifetime session.cookie_lifetime ...
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How do I capture SIGINT in Python?

...f KeyboardInterruptException is implemented as a SIGINT handler or if it really only catches Ctrl+C presses, but either way, using a signal handler makes your intent explicit (at least, if your intent is the same as OP's). More importantly though, with a signal you don't have to wrap try-catches ar...
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How to show multiline text in a table cell

...e CSS white-space:pre applied to the appropriate <td>. To do this to all table cells, for example: td { white-space:pre } Alternatively, if you can change your markup, you can use a <pre> tag around your content. By default web browsers use their user-agent stylesheet to apply the sam...
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Debugging Package Manager Console Update-Database Seed Method

... Here is similar question with a solution that works really well. It does NOT require Thread.Sleep. Just Launches the debugger using this code. Clipped from the answer if (!System.Diagnostics.Debugger.IsAttached) System.Diagnostics.Debugger.Launch(); ...
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How to manage local vs production settings in Django?

...velopment and production. And every developer has a different code base.I call anti-pattern here. – pydanny Jan 31 '13 at 16:25 8 ...
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What is tail call optimization?

... 404 Error. However, it is still available on archive.org: web.archive.org/web/20111030134120/http://www.sidhe.org/~dan/… – Tommy Nov 7 '13 at 16:30 ...