Is there any way to make a key for searching the values in the collections开发者_如何转开发 and not returning null keys and values?Just implement your own Map which throws for example IllegalArgumentE
A little question regarding performance in a Java web app. Let\'s assume I have a List<Rubrique> listRubriques with ten Rubrique objects.
When I make a list box in WPF I frequently set its ItemsSource to be a List.Is there a Tree for TreeView (or what goes in ItemsSource for TreeView)?
Is there a C# class that provides map with weak keys or/and weak values? Or 开发者_Python百科at least WeakHashMap like functionality.In .Net 3.5 and below, there is no such structure available. Howeve
I would like to obtain the string text of the elements stored in a list, say List<Car>. Would the toAr开发者_JAVA技巧ray() and the toString() methods be the best options? Another idea is to use
Is it good practice to store sub-collections of item X inside a parent collection of item X for caching \'filter-queries开发者_开发技巧\' which are performed on the parent collection? (They won\'t be
In Python, How can one subtract two non-unique, unordered lists? Say we have a = [0,1,2,1,0] and b = [0, 1, 1] I\'d like to do something like c = a - b and have c be [2, 0] or [0, 2] order doesn\'t ma
Which is the most efficient way to traverse a collection? List<Integer>a = new ArrayList<Integer>();
Why is there the method iterator() defined on the interface java.util.Collection when it already extends java.util.Iterable which has this very method defined.
I have data that is a set of ordered ints [0] = 12345 [1] = 12346 [2] = 12454 etc. I need to开发者_如何学JAVA check whether a value is in the collection in C++, what container will have the lowest c
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