On Sat, Jan 31, 2009 at 8:26 PM, Onorio Catenacci <catena...@gmail.com> wrote:
>
> Hi all,
>
> I feel like a bloody noob for having to ask this (I've been coding C++
> for years but Clojure, Lisp and Java are all new territory for me) but
> I'm missing something obvious and basic here and I'm still struggling
> with the syntax a bit.
>
> I'm trying to learn clojure by simply translating an example app from
> the Apache POI project. I'm attempting to create a dummy Excel
> spreadsheet. The code below is cut down a bit from the code I'm
> trying to run; I'm just trying to demonstrate the issue that I'm
> having.
>
> This code compiles just fine but when I run it, I see all of the
> println message except "In init-sheet". So it looks like init-sheet
> is never getting called. Would someone please give me a little
> guidance as to why the function is not getting invoked? Is this
> something to do with lazy evaluation?
>
> ****
> ;; calendardemo
> ;; 29 January 2009
> ;; Onorio Catenacci
>
> ;Clojure version of CalendarDemo app originally done by Yegor Kozlov
> ;Define namespace for app and include needed libraries
> (ns name.catenacci.calendardemo
> (:import (org.apache.poi.xssf.usermodel))
> (:import (org.apache.poi.ss.util CellRangeAddress))
> (:import (org.apache.poi.ss.usermodel))
> (:import (org.apache.poi.ss.usermodel Font))
> (:import (org.apache.poi.hssf.usermodel HSSFWorkbook))
> (:import (java.util Calendar))
> (:import (java.io FileOutputStream))
> )
>
> (def debugging true)
> ;Constant for days of the week
> (def days
> ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"])
> (if debugging (println days))
>
> ;Constant for months
> (def months
> ["January","February","March","April","May","June","July","August","September","October","November","December"])
> (if debugging (println months))
>
>
> ;hold the main calendar instance
> (def cal (. Calendar getInstance))
> (if debugging (println cal))
>
> ;now create a workbook instance
> (def wb (HSSFWorkbook.))
> (if debugging (println wb))
>
>
> ;initialize the various worksheets
> (defn init-sheet
> #^{:doc "Initialize a worksheet with a particular month"}
> ([current-month]
What are you trying to achieve with the previous line?
> (if debugging (println "In init-sheet"))
> )
> )
>
> ;For my own reference--this is an example of a Clojure sequence
> comprehension
> (for [current-month [months]]
I think you want the previous line to be:
(for [current-month months]
> (let [current-sheet (init-sheet current-month)])
> )
--
R. Mark Volkmann
Object Computing, Inc.
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