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What's the purpose of using braces (i.e. {}) for a single-line if or loop?

I'm reading some lecture notes of my C++ lecturer and he wrote the following: 23 Answers ...
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Select Row number in postgres

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How to make an image center (vertically & horizontally) inside a bigger div [duplicate]

I have a div 200 x 200 px. I want to place a 50 x 50 px image right in the middle of the div. 36 Answers ...
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When to use the JavaScript MIME type application/javascript instead of text/javascript?

Based on the question jQuery code not working in IE , text/javascript is used in HTML documents so Internet Explorer can understand it. ...
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BroadcastReceiver with multiple filters or multiple BroadcastReceivers?

I have an Android Activity that needs to catch two different broadcasts. My current approach is to have a single BroadcastReceiver within the Activity and catch both the broadcasts with it: ...
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Proper practice for subclassing UIView?

I'm working on some custom UIView-based input controls, and I'm trying to ascertain proper practice for setting up the view. When working with a UIViewController, it's fairly simple to use the loadView and related viewWill , viewDid methods, but when subclassing a UIView, the closest methosds I...
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NSLog an object's memory address in overridden description method

I am overriding an object's description method. I need to know how to print the object's memory address to replace {???} in the code below: ...
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warning about too many open figures

In a script where I create many figures with fix, ax = plt.subplots(...) , I get the warning RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (matplotlib.pyplot.figure) are retained until explicitly closed and may consume too much memory. ...
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Deleting multiple elements from a list

Is it possible to delete multiple elements from a list at the same time? If I want to delete elements at index 0 and 2, and try something like del somelist[0] , followed by del somelist[2] , the second statement will actually delete somelist[3] . ...
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How to implement __iter__(self) for a container object (Python)

I have written a custom container object. 9 Answers 9 ...