What programming languages use the most favorite sites? [closed] - programming-languages

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I would like to know what programming languages do the most famous and lucky sites use in order to understand the consensus of todays technology (at lease for several examples). What languages use the following sites?
Google
Yahoo
Facebook
YouTube
Is the language choice depend on the time when they have started to develop their projects or the languages that they use best fits to the profile of the project?

From what I know:
Google: Java, C++, Javascript, Python
Facebook: PHP, Javascript, C++
YouTube: PHP, Java, Python, Javascript
Yahoo: Javascript, Perl, and probably Java (not sure)

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What programming language should you consider to learn if you want to create music apps and music development [closed]

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What programming language for sound programming
Well there isn't really one magical language to use for making music applications. Assuming you are talking about the back-end, that could vary. For example Spotify's back-end is mostly composed of Python, but there is some Java and C++ on a few servers. iTunes is mainly written in C++, while google music's core is Python.

Why widget-centric web frameworks aren't that popular? [closed]

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I'm talking about frameworks like Vaadin (Java), Wt (C++), Reahl (Python), Agile Toolkit (PHP) and etc. In my opinion these frameworks are much easier to code in (you code in one single language without the need to know JavaScript, HTML and CSS) and to understand (the usual GUI development approach based on widgets is much simpler for a noob to understand than MVC or MVVM). Why aren't these frameworks as popular as mainstream ones? Btw is there any of this kind of frameworks that I missed? For example I haven't seen one for Ruby, Go or other commonly used web development languages.

How openSource projects are managed? [closed]

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actually I'm having Software Engineering classe, and we are trying to learn steps to make a good software. We are talking about UML, Scrum etc ... and I'm wondering how open source projects (like linux, firefox, apache, gnome, ...) are managed and what kind of system and methods are used to have a good software ?
thanks !
A fast google gave me these simple wiki pages:
Open_source_software_development
Open_source_software_assessment_methodologies
I think this will give you a start. I hope this helps you.

What language is used to program Google and Gmail [closed]

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I want to know what language is used to program Google and Gmail is it python or Java or what exactly is running at their core from programming languages part?
Google's official languages are Java, Python, C++ and JavaScript I believe.
I would be amazed if they are using .NET in any serious capacity.
.NET, C++, and java
Source: http://mirnazim.wordpress.com/2006/06/16/what-language-is-google-written/

Alternative to SharePoint in C# and open source [closed]

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Do you know any alternative to SharePoint in C# and open source?
DotNetNuke is a CMS, but SharePoint has a lot of features. Frankly speaking I would not be able to recommend any license free software equivalent to SharePoint, but you can try MetaDot if you just need portal software with CMS features.
Not sure exactly what you are looking for as an alternative, but DotNetNuke
is pretty awesome
You won't find any open-surce (or proprietary, for that matter) software with all the features of SharePoint. If you are looking for CMS, I've heard good things about Umbraco

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