2015-01-23 18:00 GMT-03:00 Sven Van Caekenberghe <s...@stfx.eu>:
>
> > On 23 Jan 2015, at 20:53, Hernán Morales Durand <
> hernan.mora...@gmail.com> wrote:
> >
> > Hi Sven,
> >
> > 2015-01-23 16:06 GMT-03:00 Sven Van Caekenberghe <s...@stfx.eu>:
> > Hi Hernán,
> >
> > > On 23 Jan 2015, at 19:50, Hernán Morales Durand <
> hernan.mora...@gmail.com> wrote:
> > >
> > > I used to use a CSV parser from Squeak where I could attach
> conditional iterations:
> > >
> > > csvParser rowsSkipFirst: 2 do: [: row | " some action ignoring first 2
> fields on each row " ].
> > > csvParser rowsSkipLast: 2 do: [: row | " some action ignoring last 2
> fields on each row " ].
> >
> > With NeoCSVParser you can describe how each field is read and converted,
> using the same mechanism you can ignore fields. Have a look at the senders
> of #addIgnoredField from the unit tests.
> >
> >
> > I am trying to understand the implementation, I see you included
> #addIgnoredFields: for consecutive fields in
> Neo-CSV-Core-SvenVanCaekenberghe.21
> > A question about usage then, adding ignored field(s) requires adding
> field types on all other remaining fields?
>
> Yes, like this:
>
> testReadWithIgnoredField
> | input |
> input := (String crlf join: #( '1,2,a,3' '1,2,b,3' '1,2,c,3' '')).
> self
> assert: ((NeoCSVReader on: input readStream)
> addIntegerField;
> addIntegerField;
> addIgnoredField;
> addIntegerField;
> upToEnd)
> equals: {
> #(1 2 3).
> #(1 2 3).
> #(1 2 3).}
>
>
May be you like to know if you make a pass to NeoCSV, for some data sets I
have 1 million of columns, it would be nice an addFieldsInterval: or such.
Thank you.
Hernán
