Recent contacts view on home screen

Hi guys, I've added some logic to create the recent contacts view. It took me a while and a lot of searching to create this functionality. With this branch, recent contacts are parsed in home.js, and listed out in descending order by the number of occurrence (the more common a name appears on screen, the higher it is on the list).
The number of contacts is limited to 5 and the user's own name is omitted from the list.

 However, there is still a part where I still don't understand (I know, I coded this up O_o). Particularly between line 124 to 134 of home.js. 
Hopefully y'all can shed some light on this and review the PR in the meantime!

Cheers! :smiley: 
This I just don't get. 
Arrays are zero indexed. Don't we need something like a `uniqueArray[j] = arrResultObj[item];` to start the array at 0?
Or does it mean that the syntax for `anArray[i++]` means that it starts from the number in `i`?

Some insights guys! @psybuzz @nikilselvam