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Is if(items != null) superfluous before foreach(T item in items)?
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It is not superflous. At runtime items will be casted to an IEnumerable and its GetEnumerator method will be called. That will cause a dereferencing of items that will fail
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What does Class mean in Java?
...s<Foo>. That way you can create a new instance, for example, without casting: Foo foo = clazz.newInstance();
if you don't use generics at all, you'll get a warning at least (and not using generics is generally discouraged as it may lead to hard-to-detect side effects)
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Python integer division yields float
...=int ? What should I do, is there a new division operator or must I always cast?
5 Answers
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AngularJS HTTP post to PHP and undefined
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you should cast your result in case $_POST is empty : $_POST = (array) json_decode(file_get_contents('php://input'), true).
– M'sieur Toph'
Oct 12 '14 at 7:12
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Replace only some groups with Regex
...iousCaptureEnd = 0;
foreach (var capture in group.Captures.Cast<Capture>())
{
var currentCaptureEnd =
capture.Index + capture.Length - m.Index;
var currentCaptureLength =
cap...
PHP convert XML to JSON
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I figured it out. json_encode handles objects differently than strings. I cast the object to a string and it works now.
foreach($xml->children() as $state)
{
$states[]= array('state' => (string)$state->name);
}
echo json_encode($states);
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Convert hex string to int
...95). So you need Long to store it. After conversion to negative number and casting back to Integer, it will fit. There is no 8 character hex string, that wouldn't fit integer in the end.
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how to pass an integer as ConverterParameter?
...ueConverter.Convert()'s "parameter" parameter is object. You still have to cast/parse it...
– Dan J
Aug 2 '11 at 16:11
6
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Use of “instanceof” in Java [duplicate]
... of this operator indicates design flaws. The abstraction that needs to be cast to the concrete type doesn't provide enough information. It's either just some bad abstraction or abstraction that is used in a wrong domain. You can check detailed explanation with an example here: medium.com/@aerokhin/...
Get a random boolean in python?
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You likely don't even need to cast to a boolean at all, since 0/1 have the proper truth values.
– Adam Vandenberg
Jul 26 '11 at 16:46
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