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Questions - comparator

Sort the list of objects by the field in included object

I want to sort the list of objects potentialHS by the distance in ElementWithDistance class but I can't get the distnace field in this way. After calling getElementWithDistance i can't call getDistanc...
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HappyProgrammer

java

list

class

sorting

comparator

Votes: 0

Answers: 1

Latest Answer

PotentialHS :: getElementWithDistance is shorthand for: (PotentialHS x) -> x.getElementWithDistance() In other words, it says: To sort this stream, applying the following operation: Per item in ...
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rzwitserloot

Why is this minHeap implementation incorrect?

I am using a PriorityQueue to solve the Meeting Rooms II problem from Leetcode. I have developed my own solution that fails on certain test cases, yet from my eyes it is indistinguishable from the pro...
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calvinhobbes123

java

java-8

comparator

priority-queue

min-heap

Votes: 0

Answers: 2

Latest Answer

else if(A[0]>B[0]){ return 0; } should be else if(A[0] == B[0]){ return 0; } You should return 0 if they're equal.
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Louis Wasserman

Java Collections.Sort doesn't / can't group by same value

enter image description here my code is : excelSheetRows -> existing JSONArray data. JSONArray sortedJsonArray = new JSONArray(); List list = new ArrayList(); for...
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Adrian Ng

java

sorting

arraylist

collections

comparator

Votes: 0

Answers: 1

Latest Answer

The problem is you're initializing the list without any type. See this answer for more explanation. If you do List list = new ArrayList() your list will contain implementations of 'Object', therefore ...
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robertobatts

Creating a minimum heap of a mapping between an object and a value

The questions is in Java. I have some sort of an Object, lets call it MyObj. Additionally, I have a way to score each instance of this object. However, the scoring depends also on another integer valu...
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user16099288

java

object

comparator

heap

minimum

Votes: 0

Answers: 1

Latest Answer

If you want to keep the keys as well as the value in a collection like a PriorityQueue need to use an object contains references to all of those values. While you could try to use generic classes like...
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Thomas

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