Question

I am trying to convert an erlang time format tuple, {megasec,sec,microsec}, into a floating point number and back again.

I can do this one way, e.g.:

{Megasec,Sec,Usec} = erlang:now().
Total = Megasec*1000000+Sec+Usec/1000000. 
1352802601.427

But I am struggling to convert this number back to the time format. I have a general idea to divide by 1000000 and round but I get rounding errors. e.g.

Mega = erlang:round(Total/1000000).
1353

If I could get this accurately I could apply similar steps to get Seconds and Microseconds.

Any ideas?

Answer 1

You can use erlang:trunc instead of erlang:round.