Javascript Array Splice without changing the index

Question

I am working on a chat and using an array to hold the users. Here is my problem:

User1 joins and is given Index 0 in the array via push. User2 joins and is given Ind

Answer 1

Use delete instead of splice.

> a = ['1', '2', '3']
< Array [ "1", "2", "3" ]

> delete a[1]
< true

> a
< Array [ "1", undefined × 1, "3" ]

> a.length
< 3