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Checking if an object is null in C#
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Luca, you can also avoid equality overrides by casting to 'object' in the test. On a similar vein, this answer should claim this instead: "if((object)data != null)" since it avoids errors when equality has been overriden.
– DAG
Mar 1...
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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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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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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How do I convert an array object to a string in PowerShell?
...r $ofs)
# This Is a cat
"$a"
# This-Is-a-cat
$ofs = '-' # after this all casts work this way until $ofs changes!
"$a"
Using operator join
# This-Is-a-cat
$a -join '-'
# ThisIsacat
-join $a
Using conversion to [string]
# This Is a cat
[string]$a
# This-Is-a-cat
$ofs = '-'
[string]$a
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Using Linq to get the last N elements of a collection?
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You can solve this problem by explicitly casting mystring to IEnumerable<String>: ((IEnumerable<String>)mystring).Reverse().Take(2).Reverse()
– Jan Hettich
Aug 17 '11 at 18:08
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Differences between fork and exec
...he "exec" functions to create the child process
execvp (argv[0], const_cast<char**>(argv));
} else { // This is the Parent Process
//Continue executing parent process
}
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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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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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Is there a more elegant way of adding an item to a Dictionary safely?
... throw) and the indexer otherwise. (It's a bit like the difference between casting and using as for reference conversions.)
If you're using C# 3 and you have a distinct set of keys, you can make this even neater:
var currentViews = new Dictionary<string, object>()
{
{ "Customers", "view2...