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| Guest |
 Posted: Mon Dec 17, 2007 6:13 pm |
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Guest
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Hi
In erlsql.erl:
encode(Val, false) when is_integer(Val) ->
integer_to_list(Val);
encode(Val, false) when is_float(Val) ->
[Res] = io_lib:format("~w", [Val]),
Res;
Is there still a reason to not to use more accurate float_to_list?
Eshell V5.5.5 (abort with ^G)
1> A=0.0000012345678.
1.23457e-6
2> io_lib:fwrite("~w", [A]).
[["1.23457",101,45,54]]
3> float_to_list(A).
"1.23456780000000008931e-06"
4>
Jouni
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| Guest |
| Posted: Mon Dec 17, 2007 6:31 pm |
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Guest
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On 12/17/07, Joneksi <Jouni.Ryno@gmail.com> wrote:
>
> Hi
>
> In erlsql.erl:
>
> encode(Val, false) when is_integer(Val) ->
> integer_to_list(Val);
> encode(Val, false) when is_float(Val) ->
> [Res] = io_lib:format("~w", [Val]),
> Res;
>
> Is there still a reason to not to use more accurate float_to_list?
>
> Eshell V5.5.5 (abort with ^G)
> 1> A=0.0000012345678.
> 1.23457e-6
> 2> io_lib:fwrite("~w", [A]).
> [["1.23457",101,45,54]]
> 3> float_to_list(A).
> "1.23456780000000008931e-06"
> 4>
You can get the best of both (compactness and accuracy) with mochinum:digits/1.
http://mochiweb.googlecode.com/svn/trunk/src/mochinum.erl
1> mochinum:digits(0.0000012345678).
"0.0000012345678"
2> float_to_list(0.1).
"1.00000000000000005551e-01"
3> mochinum:digits(0.1).
"0.1"
-bob
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| Guest |
| Posted: Wed Dec 19, 2007 12:34 am |
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Guest
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On Dec 17, 2007 10:28 AM, Bob Ippolito <bob@redivi.com> wrote:
>
> On 12/17/07, Joneksi <Jouni.Ryno@gmail.com> wrote:
> >
> > Hi
> >
> > In erlsql.erl:
> >
> > encode(Val, false) when is_integer(Val) ->
> > integer_to_list(Val);
> > encode(Val, false) when is_float(Val) ->
> > [Res] = io_lib:format("~w", [Val]),
> > Res;
> >
> > Is there still a reason to not to use more accurate float_to_list?
> >
> > Eshell V5.5.5 (abort with ^G)
> > 1> A=0.0000012345678.
> > 1.23457e-6
> > 2> io_lib:fwrite("~w", [A]).
> > [["1.23457",101,45,54]]
> > 3> float_to_list(A).
> > "1.23456780000000008931e-06"
> > 4>
>
> You can get the best of both (compactness and accuracy) with mochinum:digits/1.
>
> http://mochiweb.googlecode.com/svn/trunk/src/mochinum.erl
>
> 1> mochinum:digits(0.0000012345678).
> "0.0000012345678"
> 2> float_to_list(0.1).
> "1.00000000000000005551e-01"
> 3> mochinum:digits(0.1).
> "0.1"
>
> -bob
This looks good! The only issue is including it in the ErlyWeb
distribution (I prefer to avoid adding another dependency). Do you see
any problems with that? Do you think this file may change?
Yariv
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| Guest |
| Posted: Wed Dec 19, 2007 3:51 am |
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Guest
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If you're worried about it changing in some way you could always
rename the module or cut+paste the code into something else.
mochinum:digits/1 isn't going anywhere and I doubt its behavior is
going to change beyond a potential performance tweak or two (unless we
find a bug). I'm not going to promise we won't add more functionality
to mochinum though.
On 12/18/07, Yariv Sadan <yarivsadan@gmail.com> wrote:
>
> On Dec 17, 2007 10:28 AM, Bob Ippolito <bob@redivi.com> wrote:
> >
> > On 12/17/07, Joneksi <Jouni.Ryno@gmail.com> wrote:
> > >
> > > Hi
> > >
> > > In erlsql.erl:
> > >
> > > encode(Val, false) when is_integer(Val) ->
> > > integer_to_list(Val);
> > > encode(Val, false) when is_float(Val) ->
> > > [Res] = io_lib:format("~w", [Val]),
> > > Res;
> > >
> > > Is there still a reason to not to use more accurate float_to_list?
> > >
> > > Eshell V5.5.5 (abort with ^G)
> > > 1> A=0.0000012345678.
> > > 1.23457e-6
> > > 2> io_lib:fwrite("~w", [A]).
> > > [["1.23457",101,45,54]]
> > > 3> float_to_list(A).
> > > "1.23456780000000008931e-06"
> > > 4>
> >
> > You can get the best of both (compactness and accuracy) with mochinum:digits/1.
> >
> > http://mochiweb.googlecode.com/svn/trunk/src/mochinum.erl
> >
> > 1> mochinum:digits(0.0000012345678).
> > "0.0000012345678"
> > 2> float_to_list(0.1).
> > "1.00000000000000005551e-01"
> > 3> mochinum:digits(0.1).
> > "0.1"
> >
> > -bob
>
> This looks good! The only issue is including it in the ErlyWeb
> distribution (I prefer to avoid adding another dependency). Do you see
> any problems with that? Do you think this file may change?
>
> Yariv
>
> >
>
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| wailian |
| Posted: Tue Mar 20, 2012 2:18 am |
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Guest
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| i/p transducer requires a standard input and is for use with linear pneumatic actuators and has high air capacity. It can be easy change of the output signal from. electro pneumatic transducer is used, for example, in the biomedical field for the pneumatic control of a cardiac module, or artificial heart. |
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