Kiss Gabor [Bitman] wrote:
>Dear Peter,
>
>I suggest to change the parameter passing of library routines like
>NfSenRRD::SetupRRD.
>
>Now caller have set up several trivial params in fixed order:
> NfSenRRD::SetupRRD("$NfConf::PROFILESTATDIR/live", $new_source,
> $tstart - 300, 0);
>
>Now I plan to add Holt-Winters forecasting
>
Hi Gabor,
could you recall me how this forecast works, and what are you planning
to use it for?
Thanks,
Maurizio
> into RRDs and probably
>I'd will have other developments. This may make some parameter lists
>long and messy therefore easy to get it wrong.
>
>Hash-line named parameters are more readable:
>
> NfSenRRD::SetupRRD(
> path => "$NfConf::PROFILESTATDIR/live",
> db => $new_source,
> start => $tstart - 300,
># No 'force => 0' required because this is the default value
> hw => 1, # add Holt-Winters
> alpha => 0.4,
># Other optional parameters here
> );
>
>Then function's head could look like this:
>
>sub SetupRRD {
> my %args = @_;
> my $path = $args{path};
> my $db = $args{db};
> my $start = $args{start};
> my $hw = $args{hw}; # undef (=false) if missing
> my $force = $args{force}; # undef (=false) if missing
> my $alpha = $args{alpha} || 0.3;
> my $beta = $args{beta} || 0.002;
> my $gamma = $args{gamma} || 0.05;
>
>What is your opinion?
>
>Regards
>
>Gabor
>
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Maurizio Molina
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_____________________________________________________________________
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
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