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Seq.iter question
f#functional

Hello,

I'm new to F#. There is a personal project I've been wanting to work on for a while and I'm using it as a learning project and I finally got started. Part of what I'm doing is reading all of the lines in a csv file. I want to process these lines and then run a query, so I've got this:

Seq.iter insertData data

insertData is a simple function that runs a query and data is a string array. I need to include the filename in the query. What is the best way for me to pass that value to insertData?

Thanks for the help, I sincerely appreciate it. This has been a lot of fun, but it's been hard to wrap my brain around functional programming coming from C#.

Nick

.

Just pass in the filename to a fn that takes the args you need:

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Seq.iter (fun item -> insertData @"C:/xx" item) data

or, using currying:

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Seq.iter (insertData @"C:/xx") data

Assuming I understand your question - though ISTM that you need the filename to get the data from the CSV, not for the update - but I'm not sure what your code does.

You may find an imperative solution more clear here:

for item in data do (insertData @"c:/xx" item)

By on 3/1/2011 10:10 AM ()

Ah, thank you very much. Just what I was looking for. I have a lot to learn. I had tried it that way, but didn't have it in parens. Not sure why I didn't think of that.

Thanks,
Nick

By on 3/1/2011 10:44 AM ()

Hmm, the parens are not strictly necessary - try from the interactive:

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> let xxx a b = printfn "%A" a;;

> for i in [1;2;3] do xxx i i;;
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val it : unit = ()
>
By on 3/1/2011 11:27 AM ()

Right you are, again. I'm not sure what I had goofed up the first time. It's working now and I have a reasonably good handle on it. Thank you very much for your help.

By on 3/3/2011 8:09 AM ()

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