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What exactly is nullptr?

We now have C++11 with many new features. An interesting and confusing one (at least for me) is the new nullptr . 14 Answe...
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What is a method that can be used to increment letters?

Does anyone know of a Javascript library (e.g. underscore, jQuery, MooTools, etc.) that offers a method of incrementing a letter? ...
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Can someone give an example of cosine similarity, in a very simple, graphical way?

Cosine Similarity article on Wikipedia 10 Answers 10 ...
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How would I get a cron job to run every 30 minutes?

I'm looking to add a crontab entry to execute a script every 30 minutes, on the hour and 30 minutes past the hour or something close. I have the following, but it doesn't seem to run on 0. ...
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Disable activity slide-in animation when launching new activity?

I have an activity which launches another activity, via a button click. By default, on newer OS versions of android, the OS will animate the new activity sliding in from right to left. ...
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Pandas selecting by label sometimes return Series, sometimes returns DataFrame

In Pandas, when I select a label that only has one entry in the index I get back a Series, but when I select an entry that has more then one entry I get back a data frame. ...
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Why doesn't indexOf work on an array IE8?

The below function works fine on Opera, Firefox and Chrome. However, in IE8 it fails on the if ( allowed.indexOf(ext[1]) == -1) part. ...
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Use HTML5 to resize an image before upload

I have found a few different posts and even questions on stackoverflow answering this question. I am basically implementing this same thing as this post . ...
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What is the role of the bias in neural networks? [closed]

I'm aware of the gradient descent and the back-propagation algorithm. What I don't get is: when is using a bias important and how do you use it? ...
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Regular expression to match non-ASCII characters?

What is the easiest way to match non-ASCII characters in a regex? I would like to match all words individually in an input string, but the language may not be English, so I will need to match things like ü, ö, ß, and ñ. Also, this is in Javascript/jQuery, so any solution will need to apply to th...