Colum number where value is >0 Post: 302978817

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Top Forums Shell Programming and Scripting Colum number where value is >0 Post 302978817 by bakunin on Thursday 4th of August 2016 11:29:22 AM

08-04-2016

Registered User

Quote:

Originally Posted by wisecracker

Code:

NUM_ARRAY=( $( cat /tmp/text ) )
ARRAY_LEN=${#NUM_ARRAY[@]}

This will work with several shells and won't with others. Some shells (honestly, i don't know if bash is among them) have limits on the maximum numbers of elements an array can hold: ksh88 for instance 1023, ksh93 more than that, even if i can't remember how many.

It is usually best to stay as far away as possible from the limits, so i wouldn't use arrays for any data which could even come into the vicinity of 1000, but arguably my scripting style is far too defensive to be optimal. Having had to administrate abour 20k servers worldwide once did that for me: every conceivable nightmare was sure to be encountered on at least half a dozen systems and one gets to take absolutely nothing for granted.

How about this, using shell methods:

Code:

(( iCnt = 1 ))
string="0,0,0,0,0,3,0,0,1,0," # [....]
buf=""
rest="$string"

while [ -n "$rest" ] ; do
     rest="${string#[0-9]*,}"
     buf="${string%,$rest}"

     if (( $buf )) ; then
          echo "Element $iCnt is $buf"
     fi

     (( iCnt = iCnt + 1 ))
     string="$rest"
done

I hope this helps.

bakunin

Last edited by bakunin; 08-04-2016 at 03:03 PM.. Reason: corrected typo

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LEARN ABOUT CENTOS

ttk::frame

ttk::frame(n)							 Tk Themed Widget						     ttk::frame(n)

__________________________________________________________________________________________________________________________________________________

NAME

       ttk::frame - Simple container widget

SYNOPSIS

       ttk::frame pathName ?options?
_________________________________________________________________

DESCRIPTION

       A ttk::frame widget is a container, used to group other widgets together.

STANDARD OPTIONS

       -class		     -cursor		  -takefocus
       -style

       See the ttk_widget manual entry for details on the standard options.

WIDGET-SPECIFIC OPTIONS
       [-borderwidth borderWidth]  The desired width of the widget border.  Defaults to 0.  [-relief relief] One of the standard Tk border styles:
       flat, groove, raised, ridge, solid, or sunken.  Defaults to flat.  [-padding padding] Additional padding  to  include  inside  the  border.
       [-width width]  If specified, the widget's requested width in pixels.  [-height height] If specified, the widget's requested height in pix-
       els.

WIDGET COMMAND

       Supports the standard widget commands configure, cget, identify, instate, and state; see ttk::widget(n).

NOTES

       Note that if the pack, grid, or other geometry managers are used to manage the children of the frame, by the GM's requested size will  nor-
       mally take precedence over the frame widget's -width and -height options.  pack propagate and grid propagate can be used to change this.

SEE ALSO

       ttk::widget(n), ttk::labelframe(n), frame(n)

KEYWORDS

       widget, frame, container

Tk									8.5							     ttk::frame(n)

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