What is the difference between Collection and List in Java?
What is the difference between Collection and List in Java? When should I use which? 7 Answers 7
collections
Select N random elements from a List in C#
I need a quick algorithm to select 5 random elements from a generic list. For example, I’d like to get 5 random elements … Read more
Is there a built-in method to compare collections?
I would like to compare the contents of a couple of collections in my Equals method. I have a Dictionary and an IList. … Read more
Difference between HashSet and HashMap?
Apart from the fact that HashSet does not allow duplicate values, what is the difference between HashMap and HashSet? I mean implementation wise? … Read more
Assert equals between 2 Lists in Junit
How can I make an equality assertion between lists in a JUnit test case? Equality should be between the content of the list. … Read more
count vs length vs size in a collection
From using a number of programming languages and libraries I have noticed various terms used for the total number of elements in a … Read more
How can I initialize an ArrayList with all zeroes in Java?
It looks like arraylist is not doing its job for presizing: // presizing ArrayList<Integer> list = new ArrayList<Integer>(60); Afterwards when I try to … Read more
Case-INsensitive Dictionary with string key-type in C#
If I have a Dictionary<String,…> is it possible to make methods like ContainsKey case-insensitive? This seemed related, but I didn’t understand it properly: … Read more
Immutable vs Unmodifiable collection [duplicate]
This question already has answers here: Java Immutable Collections (7 answers) Closed 2 days ago. From the Collections Framework Overview: Collections that do … Read more
How to sort Counter by value? – python
Other than doing list comprehensions of reversed list comprehension, is there a pythonic way to sort Counter by value? If so, it is … Read more