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“Large data” work flows using pandas

... pandas. I use SAS for my day-to-day work and it is great for it's out-of-core support. However, SAS is horrible as a piece of software for numerous other reasons. ...
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Check empty string in Swift?

In Objective C, one could do the following to check for strings: 14 Answers 14 ...
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What is the best way to solve an Objective-C namespace collision?

Objective-C has no namespaces; it's much like C, everything is within one global namespace. Common practice is to prefix classes with initials, e.g. if you are working at IBM, you could prefix them with "IBM"; if you work for Microsoft, you could use "MS"; and so on. Sometimes the initials refer to ...
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Simplest two-way encryption using PHP

What is the simplest way of doing two way encryption in common PHP installs? 6 Answers ...
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How to delete a workspace in Perforce (using p4v)?

I'm new to Perforce and have created a few workspaces as exercises for getting familiar with it. Now I would like to delete some of the workspaces. I just want to get rid of the workspaces so that they do not appear on the drop-down in the workspaces view ( do not want to do anything with actual de...
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What does a just-in-time (JIT) compiler do?

What does a JIT compiler specifically do as opposed to a non-JIT compiler? Can someone give a succinct and easy to understand description? ...
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How to programmatically take a screenshot on Android?

How can I take a screenshot of a selected area of phone-screen not by any program but from code? 24 Answers ...
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Why does this CSS margin-top style not work?

I try to add margin values on a div inside another div. All works fine except the top value, it seems to be ignored. But why? ...
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What does map(&:name) mean in Ruby?

I found this code in a RailsCast : 16 Answers 16 ...
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How to delete an item in a list if it exists?

...w_tag from a form text field with self.response.get("new_tag") and selected_tags from checkbox fields with 7 Answers ...