[erlang-questions] binary_to_float: <<"2e-1">> versus <<"2.0e-1">>
Peter Morgan
peter.james.morgan@REDACTED
Fri Jan 30 09:25:16 CET 2015
I am parsing output from another system, where numbers arrive in a variety
of forms which are out of my control. This one has caught me out recently:
1> binary_to_float(<<"2e-1">>).
** exception error: bad argument
in function binary_to_float/1
called as binary_to_float(<<"2e-1">>)
Whereas:
2> binary_to_float(<<"2.0e-1">>).
0.2
On:
erl -version
Erlang (SMP,ASYNC_THREADS,HIPE) (BEAM) emulator version 6.3
Any good reason why in binary_to_float with a scientific notation the
coefficient must be a float?
I'm now pattern matching this case before passing a modified coefficient as
a floating point before passing it to binary_to_float.
Thanks,
Peter.
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