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How to redirect 404 errors to a page in ExpressJS?

...isionmedia/express/blob/master/examples/error-pages/index.js So it is actually this part: // "app.router" positions our routes // above the middleware defined below, // this means that Express will attempt // to match & call routes _before_ continuing // on, at which point we assume it's a 404...
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Finding the source code for built-in Python functions?

...out what file a particular module or function is implemented in you can usually print the __file__ attribute. Alternatively, you may use the inspect module, see the section Retrieving Source Code in the documentation of inspect. For built-in classes and methods this is not so straightforward since ...
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Serializing class instance to JSON

...ps() only knows how to serialize a limited set of object types by default, all built-in types. List here: https://docs.python.org/3.3/library/json.html#encoders-and-decoders One good solution would be to make your class inherit from JSONEncoder and then implement the JSONEncoder.default() function...
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Why would $_FILES be empty when uploading files to PHP?

I have WampServer 2 installed on my Windows 7 computer. I'm using Apache 2.2.11 and PHP 5.2.11. When I attempt to upload any file from a form, it seems to upload, but in PHP, the $_FILES array is empty. There is no file in the c:\wamp\tmp folder. I have configured php.ini to allow file uploads...
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How do I get the path to the current script with Node.js?

... So basically you can do this: fs.readFile(path.resolve(__dirname, 'settings.json'), 'UTF-8', callback); Use resolve() instead of concatenating with '/' or '\' else you will run into cross-platform issues. Note: __dirname is the l...
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mysql_config not found when installing mysqldb python interface

...the linux server I'm connected to via ssh. The script uses mysqldb. I have all the other components I need, but when I try to install mySQLdb via setuptools like so:, ...
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How can I take more control in ASP.NET?

...l give you programmatic access to the controls in their entirety including all attributes on the controls. Also, only the text box values will appear in the URL upon submission so your GET request URL will be more "meaningful" <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="JonSkeetFor...
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How does an underscore in front of a variable in a cocoa objective-c class work?

...to-generated accessor (for the property) knows which ivar to use. Specifically, in your implementation file, your synthesize should look like this: @synthesize missionName = _missionName; More generically, this is: @synthesize propertyName = _ivarName; ...
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What is the purpose of the word 'self'?

...way that makes the instance to which the method belongs be passed automatically, but not received automatically: the first parameter of methods is the instance the method is called on. That makes methods entirely the same as functions, and leaves the actual name to use up to you (although self is th...
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Re-raise exception with a different type and message, preserving existing information

...ns that it can raise (e.g. inheriting from a FooError abstract class for all the foo module's specific exceptions). This allows users of the module to catch those particular exceptions and handle them distinctly, if needed. But many of the exceptions raised from the module are raised because of ...