FindPartners

fun findPartners(key: String, arr: Array<String>): Unit {
    var name = key.substring(0, key.lastIndexOf('_'))
    val regex = Regex(name + "_[0-9]+")
    arr.forEach { s ->
        if (regex.containsMatchIn(s)) {
            println(s)
        }
    }
}

fun main(args: Array<String>) {
    val s1 =
        "/storage/emulated/0/DCIM/MomentRecorder/Videos/MomentRecorder_2022_02_19_10_20_331_1.mp4"
    val s2 =
        "/storage/emulated/0/DCIM/MomentRecorder/Videos/MomentRecorder_2022_02_19_10_20_331_2.mp4"
    val s3 =
        "/storage/emulated/0/DCIM/MomentRecorder/Videos/MomentRecorder_2022_02_19_10_20_331_3.mp4"
    val s4 =
        "/storage/emulated/0/DCIM/MomentRecorder/Videos/MomentRecorder_2022_02_19_10_20_332_4.mp4"

    findPartners(s1, arrayOf(s1, s2, s3, s4))

}