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Cocoa Core Data efficient way to count entities
I read much about Core Data.. but what is an efficient way to make a count over an Entity-Type (like SQL can do with SELECT count(1) ...). Now I just solved this task with selecting all with NSFetchedResultsController and getting the count of the NSArray ! I am sure this is not the best way...
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How do I select the “last child” with a specific class name in CSS? [duplicate]
...t that you take advantage of the fact that you can assign multiple classes to an element like so:
<ul>
<li class="list">test1</li>
<li class="list">test2</li>
<li class="list last">test3</li>
<li>test4</li>
</ul>
The last...
App Inventor 2 CustomWebView 拓展：高级版Web浏览器，完美浏览现代Web前...
... 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索 App Inventor 2 CustomWebView 拓展：高级版Web浏览器，完美浏览现...
Pros and Cons of Interface constants [closed]
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Well, I think that it boils down to the difference between good and good enough.
While in most cases you can avoid the use of constants by implementing other patterns (strategy or perhaps flyweight), there is something to be said for not needing a half do...
Using -performSelector: vs. just calling the method
I'm still kind of new to Objective-C and I'm wondering what is the difference between the following two statements?
5 Answe...
Remove duplicate values from JS array [duplicate]
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As this was reverted back to the original inArray solution by a reputable person, I am going to again mention: this solution is O(n^2), making it inefficient.
– Casey Kuball
Sep 21 '17 at 16:35
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How can I expand the full path of the current file to pass to a command in Vim?
When I go to command mode and type
6 Answers
6
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Get the current git hash in a Python script
I would like to include the current git hash in the output of a Python script (as a the version number of the code that generated that output).
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Could not load file or assembly 'System.Net.Http.Formatting' or one of its dependencies. The system
... for practice reasons, but now I am encountering an error every time I try to debug:
18 Answers
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How to check if a char is equal to an empty space?
...rong on a number of levels. Firstly, the way that the Java compiler tries to interpret that is as a call to a method with a signature of boolean Equals(char, String).
This is wrong because no method exists, as the compiler reported in the error message.
Equals wouldn't normally be the name of a...