Function duplicateEdges

Description

Get the indices of all duplicate edges by marking the second/third/... as duplicate (not the first of the duplicates). The result is given as an array with holes, where:

• the indices are the indices of the duplicate edges.
• the values are the indices of the first occurence of the duplicate. Under this system, many edges can be duplicates of the same edge. Order is not important. [5,9] and [9,5] are still duplicate.

Example

{number[]} array, [4:3, 7:5, 8:3, 12:3, 14:9] where indices
(3, 4, 8, 12) are all duplicates. (5,7), (9,14) are also duplicates.
Copy