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Express.js - app.listen vs server.listen

This may be a very basic question but I simply don't get it. What is the difference between creating an app using Express.js and starting the app listening on port 1234, for example: ...
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Set value to null in WPF binding

... I am using .NET 3.5 SP1 so it's very simple: <TextBox Text="{Binding Price, TargetNullValue=''}"/> Which stands for (thanks Gregor for your comment): <TextBox Text="{Binding Price, TargetNullValue={x:Static sys:Stri...
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C++ Exceptions questions on rethrow of original exception

... of the original exception object (which you can think of as residing in a magical memory location which will stay valid during the subsequent unwinding -- 0x98e7058 in the example below). However, In the first case, since you rethrow with throw; (which, unlike throw err;, preserves the original ...
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Example of multipart/form-data

I am wondering if anyone can share with me an example of multipart/form-data that contains: 2 Answers ...
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How to position a DIV in a specific coordinates?

... Script its left and top properties as the number of pixels from the left edge and top edge respectively. It must have position: absolute; var d = document.getElementById('yourDivId'); d.style.position = "absolute"; d.style.left = x_pos+'px'; d.style.top = y_pos+'px';...
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How persistent is localStorage?

I'm depending heavily on localStorage for a plugin I'm writing. All the user settings are stored in it. Some settings require the user the write regex'es and they would be sad if their regex rules are gone at some point. So now I am wondering just how persistent the localStorage is. ...
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Argparse: Required argument 'y' if 'x' is present

I have a requirement as follows: 5 Answers 5 ...
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Chrome Extension Message passing: response not sent

I am trying to pass messages between content script and the extension 3 Answers 3 ...
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What is the meaning of the /dist directory in open source projects?

Since I first saw a dist/ directory in many open source projects, usually on GitHub, I've been wondering what it means. 4...
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How can I output UTF-8 from Perl?

I am trying to write a Perl script using the "utf8" pragma, and I'm getting unexpected results. I'm using Mac OS X 10.5 (Leopard), and I'm editing with TextMate. All of my settings for both my editor and operating system are defaulted to writing files in utf-8 format. ...