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How to clear variables in ipython?

Sometimes I rerun a script within the same ipython session and I get bad surprises when variables haven't been cleared. How do I clear all variables? And is it possible to force this somehow every time I invoke the magic command %run? ...
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How to remove a TFS Workspace Mapping?

I had a project in tfs within a team project then we moved the project to a different location in another team project. 20 ...
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iPhone UITextField - Change placeholder text color

I'd like to change the color of the placeholder text I set in my UITextField controls, to make it black. 32 Answers ...
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How do I calculate percentiles with python/numpy?

Is there a convenient way to calculate percentiles for a sequence or single-dimensional numpy array? 11 Answers ...
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How can I install a .ipa file to my iPhone simulator

I have an iphone simulator running on my Mac. 12 Answers 12 ...
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How to get a Fragment to remove itself, i.e. its equivalent of finish()?

I'm converting an app to use fragments using the compatibility library. Now currently I have a number of activities (A B C D) which chain onto one another, D has a button 'OK' which when pressed calls finish which then bubbles up through onActivityResult() to additionally destroy C and B. ...
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How to track down log4net problems

I use log4net all the time, but one thing I've never figured out is how to tell what's going on on the inside. For example, I've got a console appender and a database appender in my project. I made a few changes to the database and the code, and now the database appender doesn't work anymore. I'll f...
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How can I use Guzzle to send a POST request in JSON?

Does anybody know the correct way to post JSON using Guzzle ? 13 Answers 13 ...
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How to cast an object in Objective-C

Is there a way to cast objects in objective-c much like the way objects are cast in VB.NET? 5 Answers ...
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Sample random rows in dataframe

I am struggling to find the appropriate function that would return a specified number of rows picked up randomly without replacement from a data frame in R language? Can anyone help me out? ...