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How to show the loading indicator in the top status bar
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It's in UIApplication:
For Objective C:
Start:
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
End:
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
For swift :
Start
UIApplication.shar...
Default value of function parameter
...n() {
Add(4);
}
The compilation of test.cpp will not see the default parameter declaration, and will fail with an error.
For this reason, the default parameter definition is usually specified in the function declaration:
lib.h
int Add(int a, int b = 3);
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Do DOM tree elements with ids become global variables?
...ed instances of a name attribute, like control-names in form input fields, parameter names in <param> or metadata type in <meta>. ‘Identifying’ names are the ones that should should be avoided in favour of id.
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UIRefreshControl on UICollectionView only works if the collection fills the height of the container
I'm trying to add a UIRefreshControl to a UICollectionView , but the problem is that the refresh control does not appear unless the collection view fills up the height of its parent container. In other words, unless the collection view is long enough to require scrolling, it cannot be pulled down...
Deep null checking, is there a better way?
... }
if (stack.Count == 0 || !(stack.Peek().Expression is ParameterExpression))
throw new ApplicationException(String.Format("The expression '{0}' contains unsupported constructs.",
expression));
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Android应用内存泄露分析、改善经验总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...先解决常见的内存泄露问题，这个过程可以借助Android Studio的Analyze-Inspect Code对代码做静态分析，常见的内存泄露问题有：
非静态内部类导致的内存泄露，比如Handler，解决方法是将内部类写成静态内部类，在静态内部类中使...
Setting an image for a UIButton in code
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@slcott, where does the documentation state that? I don't see it suggest anywhere that setImage is deprecated. (It appears to me you are confusing UIButton.setImage with UITableViewCell.image, which is a property deprecated as you stated.)
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byte[] to hex string [duplicate]
...he way for the IEnumerable<string> to go to a proper overload, i.e. (params string[] values), is we need to convert the IEnumerable<string> to string array. Prior to 4.0, string.Concat has 10 overload functions, on 4.0 it is now 12
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How to create an object property from a variable value in JavaScript? [duplicate]
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There's the dot notation and the bracket notation
myObj[a] = b;
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PHP shell_exec() vs exec()
... by default, but can provide all output as an array specifed as the second parameter.
See
http://php.net/manual/en/function.shell-exec.php
http://php.net/manual/en/function.exec.php
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