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What is “entropy and information gain”?

...er of a new unseen first-name. name gender ----------------- Now we want to predict Ashley f the gender of "Amro" (my name) Brian m Caroline f David m First step is deciding what features of the data are relevant to the target class we want t...
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What is scope/named_scope in rails?

...a collection. Sounds complicated? It isn't. Imagine this: You have Users. Now, some of those Users are subscribed to your newsletter. You marked those who receive a newsletter by adding a field to the Users Database (user.subscribed_to_newsletter = true). Naturally, you sometimes want to get those ...
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What are the new documentation commands available in Xcode 5? [closed]

...are. - returns: The number squared. */ Notice how @param is now - parameter. You can also now include bullets in your documentation: /** - square(5) = 25 - square(10) = 100 */ share ...
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How do you print in Sublime Text 2

... This should be the correct answer by now, since it makes the workaround with SublimeHighlight obsolete – klaffenboeck Nov 12 '13 at 11:16 ...
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Importing Maven project into Eclipse

...r the POM editor or other fancy wizards, I have to say that this plugin is now totally usable, provides very smooth integration, has nice features... In other words, I finally switched to it :) I'd now recommend it to any user (advanced or beginners). If I install maven eclipse plugin through th...
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Animate scrollTop not working in firefox

.... var element = ( html.scrollTop === newY ) ? 'html' : 'body'; // now reset back to the starting position window.scrollTo(0, startingY); return element; } // store the element selector name in a global var - // we'll use this as the selector for our page scrolling animation. scrol...
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Installing vim with ruby support (+ruby)

... I think "Compiling Vim With Ruby Integration On Snow Leopard" might actually help. I'm on exactly same boat at the moment. Ok... got it to work. Took me like half hour or so. This should help (I got Ubuntu): sudo apt-get install mercurial hg clone https://vim.googlecod...
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What's the difference between “version number” in iTunes Connect, “bundle version”, “bundle version

...FBundleShortVersionString are set then the CFBundleShortVersionString must now me the public version number, e.g. 1.0. And now the CFBundleVersion changes to be the build number, which is normally a single integer e.g. 374629. Hopefully this clears it up. – malhal ...
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Error handling with node.js streams

What's the correct way to handle errors with streams? I already know there's an 'error' event you can listen on, but I want to know some more details about arbitrarily complicated situations. ...
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Why do we need boxing and unboxing in C#?

...e type). Think of it like this. You have a variable o of type object. And now you have an int and you want to put it into o. o is a reference to something somewhere, and the int is emphatically not a reference to something somewhere (after all, it's just a number). So, what you do is this: you make...