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Re: [Help-bash] Bash read specific element from csv

From: Greg Wooledge
Subject: Re: [Help-bash] Bash read specific element from csv
Date: Tue, 7 Oct 2014 14:29:02 -0400
User-agent: Mutt/

On Tue, Oct 07, 2014 at 08:03:44PM +0200, Phil wrote:
> The objective is simply for filenaming purposes.   The file of which a 
> snapshot is given underneath comes in everyday.   When the file is 
> received it is always called Euronext.csv.   The objective is simply to 
> read the data stamp in the third row first column (28 Sep 2014), and 
> rename the file from Euronext.csv to Euronext 28 Sep 2014.csv or even 
> better Euronext 20140928.csv

OK.  I was afraid you would go on to say something like "And then I
need to read each line after that, and extract the Hoog field, ..."

> >><--------- SNAP --------->
> >>"Naam";"ISIN";"Symbol";"Market";"Trading
> >>Currency";"Open";"Hoog";"Laag";"Last";"Last Date/Time";"Time
> >>Zone";"Volume";"Turnover"
> >>"European Equities";"";;;;;;;;;;;
> >>"28 Sep 2014";;;;;;;;;;;;

The only semi-difficult thing at this point is converting Sep to 09.
That can be done with an associative array in Bash 4.

declare -A month
for m in Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec; do
    printf -v "month[$m]" %02d $((i++))

{ read; read; IFS=';' read date _; } < Euronext.csv
read d m y <<< "$date"
filename="Euronext $y${month[$m]}$d.csv"
echo "<$filename>"

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