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Finding out whether a string is numeric or not

... @KMGorbunov I don't think that NSCharacterSet is actually storing a backing set that contains every single character in the set. I suspect invertedSet is returning a class that wraps the set it was created form, and returns the opposite value for all queries. But I don't know f...
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Can I set an opacity only to the background image of a div?

...n IE from version 8, while the ::before pseudo-element is not supported at all. This will hopefully be rectified in version 10. HTML <div class="myDiv"> Hi there </div> CSS .myDiv { position: relative; z-index: 1; } .myDiv:before { content: ""; position: absolut...
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What is the aspnet_client folder for under the IIS structure?

... In addition to what others have said, it's usually created by the aspnet_regiis tool, which can be (re-)run by things like Windows Update/AddRemove Windows components/IIS. So sometimes even if you do delete it, it can come back randomly. There may be a way to stop this ...
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Mockito + PowerMock LinkageError while mocking system class

...nd any way to do this. We have hundreds of tests ... i can not adjust them all. – Frederic Leitenberger Jul 11 '17 at 18:01 1 ...
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Encrypting & Decrypting a String in C# [duplicate]

...be getting a lot of upvotes, I've updated it to fix silly bugs and to generally improve the code based upon comments and feedback. See the end of the post for a list of specific improvements. As other people have said, Cryptography is not simple so it's best to avoid "rolling your own" encryption ...
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Difference between ActionBarSherlock and ActionBar Compatibility

...t a native one. --EDIT-- It appears things have changed and there is actually no difference between ActionBarSherlock and the Action Bar Compatibility anymore. Please read the comments below for details. --EDIT-- After having used both now, I can say that I actually prefer ActionBarSherlock to A...
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What can , and be used for?

...iewParam name="id" value="#{bean.id}" /> </f:metadata> does basically the following: Get the request parameter value by name id. Convert and validate it if necessary (you can use required, validator and converter attributes and nest a <f:converter> and <f:validator> in it like...
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Reusable library to get human readable version of file size?

... Addressing the above "too small a task to require a library" issue by a straightforward implementation: def sizeof_fmt(num, suffix='B'): for unit in ['','Ki','Mi','Gi','Ti','Pi','Ei','Zi']: if abs(num) < 1024.0: return "%3.1f...
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How to run a python script from IDLE interactive shell?

...s.call(['python', 'helloworld.py']) # Just run the program subprocess.check_output(['python', 'helloworld.py']) # Also gets you the stdout With arguments: subprocess.call(['python', 'helloworld.py', 'arg']) Read the docs for details :-) Tested with this basic helloworld.py: import sys if le...
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Django admin: how to sort by one of the custom list_display fields that has no database field

How could I sort Customers, depending on number_of_orders they have? 3 Answers 3 ...