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What's is the difference between train, validation and test set, in neural networks?

... The training and validation sets are used during training. for each epoch for each training data instance propagate error through the network adjust the weights calculate the accuracy over training data fo...
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Should I use single or double colon notation for pseudo-elements?

Since IE7 and IE8 don't support the double-colon notation for pseudo-elements (e.g. ::after or ::first-letter ), and since modern browsers support the single-colon notation (e.g. :after ) for backwards compatibility, should I use solely the single-colon notation and when IE8's market share drops...
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Difference between and

I'm learning Spring 3 and I don't seem to grasp the functionality behind <context:annotation-config> and <context:component-scan> . ...
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The name does not exist in the namespace error in XAML

... When you are writing your wpf code and VS tell that "The name ABCDE does not exist in the namespace clr-namespace:ABC". But you can totally build your project successfully, there is only a small inconvenience because you can not see the UI designing (or just w...
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Downloading a Google font and setting up an offline site that uses it

I have a template and it has a reference to a Google font like this: 11 Answers 11 ...
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How do I debug error ECONNRESET in Node.js?

I'm running an Express.js application using Socket.io for a chat webapp and I get the following error randomly around 5 times during 24h. The node process is wrapped in forever and it restarts itself immediately. ...
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Naming of ID columns in database tables

... id you are making reporting that much more difficult. It obscures meaning and makes complex queries harder to read as well as requiring you to use aliases to differentiate on the report itself. Further if someone is foolish enough to use a natural join in a database where they are available, you ...
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Best practice for localization and globalization of strings and labels [closed]

...far as I know, there's a good library called localeplanet for Localization and Internationalization in JavaScript. Furthermore, I think it's native and has no dependencies to other libraries (e.g. jQuery) Here's the website of library: http://www.localeplanet.com/ Also look at this article by M...
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Default constructor vs. inline field initialization

What's the difference between a default constructor and just initializing an object's fields directly? 5 Answers ...
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What is the difference between IQueryable and IEnumerable?

What is the difference between IQueryable<T> and IEnumerable<T> ? 13 Answers ...