collections Archives - Page 7 of 12

What are the reasons why Map.get(Object key) is not (fully) generic

What are the reasons behind the decision to not have a fully generic get method in the interface of java.util.Map<K, V>. To clarify ...

May 6, 2022
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Is it better to return null or empty collection?

That’s kind of a general question (but I’m using C#), what’s the best way (best practice), do you return null or empty collection ...

May 5, 2022
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LINQ .Any VS .Exists – What’s the difference?

Using LINQ on collections, what is the difference between the following lines of code? if(!coll.Any(i => i.Value)) and if(!coll.Exists(i => i.Value)) Update 1 ...

May 5, 2022
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Easy way to convert Iterable to Collection

In my application I use 3rd party library (Spring Data for MongoDB to be exact). Methods of this library return Iterable<T>, while the ...

May 4, 2022
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Most efficient way to increment a Map value in Java

I hope this question is not considered too basic for this forum, but we’ll see. I’m wondering how to refactor some code for ...

May 4, 2022
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Get nth character of a string in Swift programming language

How can I get the nth character of a string? I tried bracket(...

May 4, 2022
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Retrieving a List from a java.util.stream.Stream in Java 8

I was playing around with Java 8 lambdas to easily filter collections. But I did not find a concise way to retrieve the ...

May 4, 2022
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How to convert int[] into List in Java?

How do I convert int into List<Integer> in Java? Of course, I’m interested in any other answer than doing it in a loop, ...

May 3, 2022
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