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Delete/Reset all entries in Core Data?

Do you know of any way to delete all of the entries stored in Core Data? My schema should stay the same; I just want to reset it to blank. ...
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MongoDB SELECT COUNT GROUP BY

... I need some extra operation based on the result of aggregate function. Finally I've found some solution for aggregate function and the operation based on the result in MongoDB. I've a collection Request with field request, source, status, requestDate. Single Field Group By & Count: db.Request...
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Unit Testing AngularJS directive with templateUrl

... You're correct that it's related to ngMock. The ngMock module is automatically loaded for every Angular test, and it initializes the mock $httpBackend to handle any use of the $http service, which includes template fetching. The template system tries to load the template through $http and it become...
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Check whether a path is valid in Python without creating a file at the path's target

... I need to test if the file-name is a valid, e.g. if the file-system will allow me to create a file with such a name. The file-name has some unicode characters in it. ...
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How do I best silence a warning about unused variables?

I have a cross platform application and in a few of my functions not all the values passed to functions are utilised. Hence I get a warning from GCC telling me that there are unused variables. ...
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Delete files older than 10 days using shell script in Unix [duplicate]

... these! Once, using a command very much like this in a cron job, I accidentally deleted every file on my production mail server older than 10 days, which I can tell you was no fun to recover from. – DSimon May 28 '14 at 20:00 ...
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Vim: apply settings on files in directory

How do I specify Vim settings for all files under the current directory? 11 Answers 11...
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How to do a less than or equal to filter in Django queryset?

I am attempting to filter users by a custom field in each users profile called profile. This field is called level and is an integer between 0-3. ...
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How to read keyboard-input?

... mixing different Pythons here (Python 2.x vs. Python 3.x)... This is basically correct: nb = input('Choose a number: ') The problem is that it is only supported in Python 3. As @sharpner answered, for older versions of Python (2.x), you have to use the function raw_input: nb = raw_input('Choose...
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Why are preprocessor macros evil and what are the alternatives?

I have always asked this but I have never received a really good answer; I think that almost any programmer before even writing the first "Hello World" had encountered a phrase like "macro should never be used", "macro are evil" and so on, my question is: why? With the new C++11 is there a real alte...