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Better way to sum a property value in an array
...ion:
Using reduce Array prototype method is sufficient
// + operator for casting to Number
items.reduce((a, b) => +a + +b.price, 0);
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The Role Manager feature has not been enabled
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this doesnt work becuase you need to cast userid to int such that: userManager.GetRoles(Convert.ToInt32(User.Identity.GetUserId<int>()));
– toy
Jul 25 '17 at 22:47
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How to identify platform/compiler from preprocessor macros?
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See: http://predef.sourceforge.net/index.php
This project provides a reasonably comprehensive listing of pre-defined #defines for many operating systems, compilers, language and platform standards, and standard libraries.
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Detect if device is iOS
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@astronought double negation is used to cast to a boolean
– Vitim.us
Jun 14 '19 at 20:18
3
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SqlDataAdapter vs SqlDataReader
...n a datareader. Just use an iterator block to yield return the DataReader cast as an IDataRecord inside your while (reader.Read()) loop.
– Joel Coehoorn
Nov 4 '09 at 21:57
7
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Webrick as production server vs. Thin or Unicorn?
...e that has multiple components, and maybe one section is Rails, another is PHP, and rewrites are needed for both (i.e. rewrite old PHP paths to Rails)
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Is it possible to determine whether ViewController is presented as Modal?
...is property. And after that, inside the controllers, you will have to keep casting self.navigationController to this custom class every time you need to check if the controller is presented as modal
– Felipe Sabino
Dec 30 '11 at 11:27
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How to print to console when using Qt
...move_reference<C>::type>::type& no_const(C* c) { return const_cast<typename std::remove_const<typename std::remove_reference<C>::type>::type&>(*c); } Use: no_const(this).method(). You could inject that function as a method into the class, and then you wouldn't even...
How can I default a parameter to Guid.Empty in C#?
...lt to a new object creates a new object every time the method is called in PHP; but only creates one object for the entire program in Python. Really, I consider this to be one of the very few design flaws of Python. I'm somewhat glad C# (and VB.Net) avoided this issue by simply disallowing new obj...
getActivity() returns null in Fragment function
...ity is a context so if you can simply check the context is an Activity and cast it if necessary.
@Override
public void onAttach(Context context) {
super.onAttach(context);
Activity a;
if (context instanceof Activity){
a=(Activity) context;
}
}
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