大约有 46,000 项符合查询结果（耗时：0.0497秒） [XML]
Extension method and dynamic object
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It might be more readable to cast back to the know type, this works: Console.WriteLine(((List<int>)dList).First()); Or Console.WriteLine((dList as List<int>).First());.
– AVee
Jun 18 '19 at 13:46
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How can I make Array.Contains case-insensitive on a string array?
...ng case insensitivity into account) is at least possible like this, with a cast:
if ( ((IList<string>)mydotNet2Array).Contains(“str”) )
{}
As the Contains() method is part of the IList interface, this works not only with arrays, but also with lists, etc.
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What is a bus error?
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In my case, a method static_casted a void * parameter to an object that stores a callback (one attribute points to the object and the other to the method). Then the callback is called. However, what was passed as void * was something completely differen...
What's the hardest or most misunderstood aspect of LINQ? [closed]
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Agreed. I'm a veteran and I just realized this implicit casting was taking place as I started writing my own QueryProvider
– TheSoftwareJedi
May 31 '09 at 16:31
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How do I get a class instance of generic type T?
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java.lang.ClassCastException: java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType
– Khan
May 6 at 15:46
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dispatch_after - GCD in Swift?
...e was slightly wrong. Implicit typing causes a compile error if you don't cast NSEC_PER_SEC to a Double.
If anyone can suggest a more optimal solution I'd be keen to hear it.
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C# difference between == and Equals()
... comparisons should only be performed IMHO with values that are explicitly cast to matching types. The comparison of a float to something other than a float, or a double to something other than a double, strikes me as a major code smell that should not compile without diagnostics.
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DateTime format to SQL format using C#
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Yeah, on the official page CAST and CONVERT (Transact-SQL), they use the name "ODBC canonical" for the form with a space separating yyyy-MM-dd from the time of day, and the name "ISO8601" for the form where the separating character is a T. But yes, bot...
How to avoid “RuntimeError: dictionary changed size during iteration” error?
...ot iterate through a dictionary while its changing during for loop. Make a casting to list and iterate over that list, it works for me.
for key in list(d):
if not d[key]:
d.pop(key)
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iOS: Use a boolean in NSUserDefaults
...MainScreen()
}
alternatively we can use object(forKey:) then cast it to bool
if let exists = Defaults.object(forKey: "isLoggedIn"), let isLoggedIn = exists.boolValue where isLoggedIn == true {
displayMainScreen()
} else {
displayLoginScreen()
}
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