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Using JavaScript count the number of elements equal to or higher than the index in a loop

I'm working on a JavaScript function that can create an authors- H-Index. H-Index is the highest number of publication an author has written with just as many citations in other articles. I have

let array = [0,0,0,1,1,2,3,3,5,6,6,7,20,20,20]

This is the number of citied articles in ascending order

I need to loop the array until the index is more that the count of the items equal to or higher than the index

Such as

for (let i = 1; i < array.length; i++){
  count all items that are above i (0's get skipped)
  if there are more than i then loop to next i if not exit with i - 1
  console.log(i)
 }

What I'm looking for is 6 with an efficient loop. Thanks for the help

I've played with map and filtered inside the loop but I can't seem to get the correct syntax

Via Active questions tagged javascript - Stack Overflow https://ift.tt/2FdjaAW

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