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C# Lambda expressions: Why should I use them?
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In the first example, why not cast sender and get the value?
– Andrew
Sep 16 '17 at 21:27
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Best way to detect that HTML5 is not supported
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@2astalavista The double negative (!!) is like casting. It turns a truey or falsey statement into a boolean. For example: var i = 0. i evaluates to false, but typeof i returns "number". typeof !!i returns "boolean".
– User2
Jun 12 '1...
Are HLists nothing more than a convoluted way of writing tuples?
...provides a form of polymorphic function value which allows the compiler to select type-specific cases in exactly the way you're doubtful about. For instance,
// size is a function from values of arbitrary type to a 'size' which is
// defined via type specific cases
object size extends Poly1 {
imp...
Hidden Features of JavaScript? [closed]
...amic typing may continue to use == for situations where we know we want to cast, as in 0 == '' or 0 == '0'.
– thomasrutter
Apr 1 '09 at 5:15
20
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Best way to trim strings after data entry. Should I create a custom model binder?
...r.PropertyType == typeof(string) && !propertyDescriptor.Attributes.Cast<object>().Any(a => a.GetType() == typeof(NoTrimAttribute)))
and you can mark properties to be excluded from trimming with [NoTrim] attribute.
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What is the difference between Collections.emptyList() and Collections.EMPTY_LIST
...t is probably always preferable. This way, you don't need to unnecessarily cast around within your code.
Collections.emptyList() intrinsically does the cast for you.
@SuppressWarnings("unchecked")
public static final <T> List<T> emptyList() {
return (List<T>) EMPTY_LIST;
}
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How to sort an array of associative arrays by value of a given key in PHP?
...es from the comparison function, such as float, will result in an internal cast to integer of the callback's return value. So values such as 0.99 and 0.1 will both be cast to an integer value of 0, which will compare such values as equal.
This is an important trap to bear in mind when using usort ...
Create instance of generic type in Java?
...error, while new Foo<Bar>(){}; doesn't? (Exception: "Class cannot be cast to ParameterizedType")
– Tim Kuipers
Dec 22 '13 at 14:52
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Compiler Ambiguous invocation error - anonymous method and method group with Func or Action
...exactly the situation we are in here.
Moving on:
A single method M is selected corresponding to a method invocation of the form E(A) [...] The argument list A is a list of expressions, each classified as a variable [...] of the corresponding parameter in the formal-parameter-list of D.
OK. So...
Convert from List into IEnumerable format
...plements IEnumerable<T>. It means that you do not have to convert or cast anything.
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