Category "collections"

Merge Map<String, List<String> Java 8 Stream

I would like to merge two Map with JAVA 8 Stream: Map<String, List<String>> mapGlobal = new HashMap<String, List<String>>(); Map<Str

HashMap with List of Objects as a Key

in HashMap when I pass List of Objects as Key I get different results. List<NewClass> list1 = new ArrayList<>(); List<NewClass> list2 = new Ar

Java Stream: divide into two lists by boolean predicate

I have a list of employees. They have isActive boolean field. I would like to divide employees into two lists: activeEmployees and formerEmployees. Is it possib

How to determine if a type is a type of collection?

I am trying to determine if a runtime type is some sort of collection type. What I have below works, but it seems strange that I have to name the types that I b

Create and loop through collection subset of controls

Im making a small vb.net windows form application in which I have 4 ComboBoxes. I would like to add the ComboBoxes to a collection and be able to loop through t

Is there a way to filter out null Any? values in Kotlin Map?

I'm trying to think of a function that would allow a Map<String, Any?> object to be treated as Map<String,Any> through type inference through applyi

Clone a List, Map or Set in Dart

Coming from a Java background: what is the recommended way to "clone" a Dart List, Map and Set?

Return new collection without modifying original collection

I have a Laravel collection and I want to modify one of its property value to negative integer. For this I am using the collection map method but it also modify

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