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When should I use the Visitor Design Pattern? [closed]
...t to the methods. I would prefer a simple performTask(Object *obj) and you cast this object in the Operation class. (and in language supporting overriding, no need for casting)
– Abdalrahman Shatou
Dec 6 '13 at 18:01
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How can I convert a string to a number in Perl?
...00'..'15') and needed to remove the leading zeros in some places. This 0+ casting to a number also achieves that.
– stevesliva
Nov 4 '16 at 16:18
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What is the idiomatic Go equivalent of C's ternary operator?
... on the condition, we have access to its methods. Methods that receive and select from the operands.
So
Converting 'ArrayList to 'String[]' in Java
...ourse, because Java doesn't do real generics; it mostly just fakes them by casting Object)
– Nyerguds
May 19 '16 at 11:05
3
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Difference between List, List, List, List, and List
... you pointed out this is not the case. The reason why was that if we could cast from List<String> to List<Object>, then we could put Objects into that list, thus violating the original contract of List<String> when attempting to retrieve an element.
– Peter
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Mark parameters as NOT nullable in C#/.NET?
... where o.Value == null
select o;
bool paramsNull = nullParams.Count() > 0;
if (paramsNull)
{
StringBuilder sb = new StringBuilder();
foreach (var param in nullParams)
...
iPhone: How to get current milliseconds?
... the OS you might need to use 'long long' instead of a 'long' and likewise cast time.tv_sec to 'long long' before doing the rest of the calculation.
– AbePralle
Dec 1 '11 at 23:20
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How do I best silence a warning about unused variables?
...me in C++. If it's templated, it won't be used in C, so you don't need the cast-to-void trick.
– Alex B
Oct 7 '13 at 4:55
13
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Android OnClickListener - identify a button
...s not correct. View is not a Button, but Button is a View. Though, you can cast a View to a Button. Keep in mind that the second way to do it is not recommended... maybe that v may not be a Button, which will generate a cast exception.
– Cristian
Jul 23 '10 at ...
What is a NullReferenceException, and how do I fix it?
... to find out where the reference is or isn't set, right-click its name and select "Find All References". You can then place a breakpoint at every found location and run your program with the debugger attached. Every time the debugger breaks on such a breakpoint, you need to determine whether you exp...