It is times. Station a: (sorted)
{Train 0 => 1230, Train 1 => 1244, Train 2 => 1245 , Train 3 => 1247 }
Station b: Train 3 does not stop here, so time is 0000. But I know it is following Train 1.
{Train 1 => 1245, Train 2 => 0000 , Train 3 => 1248 }
I will take the existing order of trains, and calculate the next station.
But trains can be overtaken by other trains in which case I will have a time for the train. So if as station c Train 1 overtakes Train 3 but Train 2 has no time the array would be { Train 0 => 1245, Train 1 => 1255, Train 2 => 0000, Train 3 = 1250 }. In that case my sorting needs to set Train 1at the end, while the other trains need to be kept in order. It is not 5 entries but a couple of 100000s of times that need to be sorted.

In reply to Re: Re: Exceptional sorting by PerlingTheUK
in thread Exceptional sorting by PerlingTheUK

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