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Python nonlocal statement

What does the Python nonlocal statement do (in Python 3.0 and later)? 9 Answers 9 ...
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Twitter Bootstrap Form File Element Upload Button

Why isn't there a fancy file element upload button for twitter bootstrap? It would be sweet if the blue primary button was implemented for the upload button. Is it even possible to finesse the upload button using CSS? (seems like a native browser element that can't be manipulated) ...
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Scheduling recurring task in Android

I'm designing an app that has a recurring task of sending presence to a dedicated server as long as the app is in foreground. ...
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Usage of @see in JavaDoc?

When do I use @see when dealing with JavaDocs? What is its usage? 4 Answers 4 ...
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What Makes a Method Thread-safe? What are the rules?

Are there overall rules/guidelines for what makes a method thread-safe? I understand that there are probably a million one-off situations, but what about in general? Is it this simple? ...
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Add querystring parameters to link_to

I'm having difficultly adding querystring parameters to link_to UrlHelper. I have an Index view, for example, that has UI elements for sorting, filtering, and pagination (via will_paginate). The will_paginate plugin manages the intra-page persistence of querystring parameters correctly. ...
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Performance - Date.now() vs Date.getTime()

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What does “Protocol … can only be used as a generic constraint because it has Self or associated typ

I am trying to create a Dictionary (actually a HashSet ) keyed on a custom protocol in Swift, but it is giving me the error in the title: ...
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jQuery.active function

I was trying to find some more information on the following jQuery function: 2 Answers ...
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Show percent % instead of counts in charts of categorical variables

I'm plotting a categorical variable and instead of showing the counts for each category value. 8 Answers ...