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invalid context 0x0 under iOS 7.0 and system degradation
...oubt that's the issue. These invalid context 0x0 error messages are common and easy to reproduce in iOS 7. In fact, I can reproduce the error using storyboard with zero code. I drag a UITextField onto the canvas in IB, run the app, and double tap inside the text field.
In many situations, it's har...
Mongoose subdocuments vs nested schema
I'm curious as to the pros and cons of using subdocuments vs a deeper layer in my main schema:
6 Answers
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When to use AtomicReference in Java?
...e = someFunctionOfOld(cachedValueToUpdate);
boolean success = cache.compareAndSet(cachedValue,cachedValueToUpdate);
Because of the atomic reference semantics, you can do this even if the cache object is shared amongst threads, without using synchronized. In general, you're better off using synchro...
Ruby class instance variable vs. class variable
...mmon to that class without having sub-classes automatically also get them (and vice-versa). With class variables, you have the convenience of not having to write self.class from an instance object, and (when desirable) you also get automatic sharing throughout the class hierarchy.
Merging these t...
What are advantages of Artificial Neural Networks over Support Vector Machines? [closed]
ANN (Artificial Neural Networks) and SVM (Support Vector Machines) are two popular strategies for supervised machine learning and classification. It's not often clear which method is better for a particular project, and I'm certain the answer is always "it depends." Often, a combination of both alon...
Setting dynamic scope variables in AngularJs - scope.
...ng I have gotten from a routeParam or a directive attribute or whatever, and I want to create a variable on the scope based on this. So:
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In C#, should I use string.Empty or String.Empty or “” to intitialize a string?
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Use whatever you and your team find the most readable.
Other answers have suggested that a new string is created every time you use "". This is not true - due to string interning, it will be created either once per assembly or once per AppDo...
Debug code-first Entity Framework migration codes
I'm using Entity Framework code first in my website and I'm just wondering if there is any way to debug the migration codes. You know, like setting breakpoints and stuff like this.
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How to open Atom editor from command line in OS X?
I have the Atom editor and was wondering how you can open a file or folder from the terminal in Atom. I am using a Mac. I am looking for a way to do this:
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Is !important bad for performance?
I hate them, it defies the cascading nature of CSS, and if you don't use them with care you end up in a loop of adding more !important .
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