collections Archives - Page 3 of 12

Size-limited queue that holds last N elements in Java

A very simple & quick question on Java libraries: is there a ready-made class that implements a Queue with a fixed maximum size … Read more

Google Guava vs. Apache Commons [closed]

by IT Nursery

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, … Read more

How to count the number of occurrences of an element in a List

by IT Nursery

I have an ArrayList, a Collection class of Java, as follows: ArrayList<String> animals = new ArrayList<String>(); animals.add(“bat”); animals.add(“owl”); animals.add(“bat”); animals.add(“bat”); As you can … Read more

How to sort an ArrayList in Java [duplicate]

by IT Nursery

This question already has answers here: Sort ArrayList of custom Objects by property (29 answers) Closed 8 years ago. I have a class … Read more

Convert JSON to Map

by IT Nursery

What is the best way to convert a JSON code as this: { “data” : { “field1” : “value1”, “field2” : “value2” } … Read more

Is there a way to get a collection of all the Models in your Rails app?

by IT Nursery

Is there a way that you can get a collection of all of the Models in your Rails app? Basically, can I do … Read more

MongoDB Show all contents from all collections

by IT Nursery

Is it possible to show all collections and its contents in MongoDB? Is the only way to show one by one? 6 Answers … Read more

Kotlin’s List missing “add”, “remove”, Map missing “put”, etc?

by IT Nursery

In Java we could do the following public class TempClass { List<Integer> myList = null; void doSomething() { myList = new ArrayList<>(); myList.add(10); … Read more