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How do I get the first element from an IEnumerable in .net?

I often want to grab the first element of an IEnumerable<T> in .net, and I haven't found a nice way to do it. The best I've come up with is: ...
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parseInt vs unary plus, when to use which?

What are the differences between this line: 5 Answers 5 ...
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Find and replace with sed in directory and sub directories

I run this command to find and replace all occurrences of 'apple' with 'orange' in all files in root of my site: 7 Answers ...
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What are the differences between concepts and template constraints?

I want to know what are the semantic differences between the C++ full concepts proposal and template constraints (for instance, constraints as appeared in Dlang or the new concepts-lite proposal for C++1y ). ...
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Easier way to create circle div than using an image?

I'm wondering if there's an easier way to create circular divs than what I'm doing now. 14 Answers ...
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Base64 encoding and decoding in client-side Javascript

Are there any methods in JavaScript that could be used to encode and decode a string using base64 encoding? 13 Answers ...
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How can I improve my paw detection?

After my previous question on finding toes within each paw , I started loading up other measurements to see how it would hold up. Unfortunately, I quickly ran into a problem with one of the preceding steps: recognizing the paws. ...
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Minimal web server using netcat

I'm trying to set up a minimal web server using netcat (nc). When the browser calls up localhost:1500, for instance, it should show the result of a function ( date in the example below, but eventually it'll be a python or c program that yields some data). My little netcat web server needs to be a w...
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How to update Python?

I have version 2.7 installed from early 2012. I can't find any consensus on whether I should completely uninstall and wipe this version before putting on the latest version. ...
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How should one use std::optional?

I'm reading the documentation of std::experimental::optional and I have a good idea about what it does, but I don't understand when I should use it or how I should use it. The site doesn't contain any examples as of yet which leaves it harder for me to grasp the true concept of this object. When...