[erlang-questions] Fwd: Change in behaviour in 5.9

Michael Schreckenbauer <>
Fri Jan 13 23:34:23 CET 2012


Hi,

Am Freitag, 13. Januar 2012, 23:21:46 schrieb Vlad Dumitrescu:
> ... and to the list ....
> 
> Hi!
> 
> On Fri, Jan 13, 2012 at 23:15, Bob Cowdery <> wrote:
> > In erl 5.8.2 I had this:
> > S = io_lib:format("~10.6.0f", [Freq]),
> > where Freq was a float, say 7.0 and this gave me
> > [["00","7.000000"]] so I concat the strings to get what I want which is
> > "007.000000"
> > 
> > In 5.9 the code breaks because I get [["00",55,46,48,48,48,48,48,48]].
> > 
> > Neither look right to me but I really don't understand the 5.9 result.
> > 
> > If I do io:format("~10.6.0f", [7.0]). it gives me what I would expect
> > "007.000000".
> > 
> > Can someone explain these behaviours please.
> 
> io:format returns an iolist. The exact contents may vary, but they
> represent the same thing:
> 3> erlang:iolist_to_binary([["00",55,46,48,48,48,48,48,48]]).
> <<"007.000000">>

My (5.8.5) io:format returns ok.

Eshell V5.8.5  (abort with ^G)
1> A=io:format("lalala", []).
lalalaok
2> A.
ok
3>

> regards,
> Vlad

Best,
Michael




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