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Full Discussion: Showing 4 digits
Top Forums Shell Programming and Scripting Showing 4 digits Post 302979388 by Don Cragun on Saturday 13th of August 2016 12:35:22 PM
Old 08-13-2016
Quote:
Originally Posted by remibemol
thank you so much for your welcome.

I was thinking about to use that, the problem is that originaly I had a script witch allow me to include this number in a comand to download some file.
Code:
count=0
while read p; do
  echo wget -O "$2_img${count}.jpg" $p
  count=$((count+1))
  
done <2

then, with your script I manadge to print all the line of the file,
but then it's does't seem to work to create command

I put echo to debug it but I want to make it part of a comand with wget.

I hope I'm clear enough for you to understand.
Change the:
Code:
  echo wget -O "$2_img${count}.jpg" $p

to:
Code:
  echo wget -O "$2_img$(printf '%04d' "$count").jpg" $p

and get rid of the echo when you are done debugging.

PS If you tell us what operating system and shell you're using, we might also be able to suggest some shell specific shortcuts to do this. Depending on what shell and (and version of that shell) you're using, there might be shortcuts that would run slightly faster, but would be less portable.
Last edited by Don Cragun; 08-13-2016 at 01:38 PM.. Reason: Add PS.
This User Gave Thanks to Don Cragun For This Post:
remibemol
 

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LEARN ABOUT REDHAT

stack

stack(n)							Tcl Data Structures							  stack(n)

NAME

       stack - Create and manipulate stack objects

SYNOPSIS

       package require Tcl 8.2

       package require struct ?1.2.1?

       stackName option ?arg arg ...?

       stackName clear

       stackName destroy

       stackName peek ?count?

       stackName pop ?count?

       stackName push item ?item ...?

       stackName size

DESCRIPTION

       The  ::struct::stack command creates a new stack object with an associated global Tcl command whose name is stackName.  This command may be
       used to invoke various operations on the stack.	It has the following general form:

       stackName option ?arg arg ...?
	      Option and the args determine the exact behavior of the command.	The following commands are possible for stack objects:

       stackName clear
	      Remove all items from the stack.

       stackName destroy
	      Destroy the stack, including its storage space and associated command.

       stackName peek ?count?
	      Return the top count items of the stack, without removing them from the stack.  If count is not specified, it  defaults  to  1.	If
	      count  is  1,  the  result is a simple string; otherwise, it is a list.  If specified, count must be greater than or equal to 1.	If
	      there are no items on the stack, this command will return count empty strings.

       stackName pop ?count?
	      Return the top count items of the stack, and remove them from the stack.	If count is not specified, it defaults to 1.  If count	is
	      1, the result is a simple string; otherwise, it is a list.  If specified, count must be greater than or equal to 1.  If there are no
	      items on the stack, this command will return count empty strings.

       stackName push item ?item ...?
	      Push the item or items specified onto the stack.	If more than one item is given, they will be pushed in the order they are listed.

       stackName size
	      Return the number of items on the stack.

KEYWORDS

       queue, matrix, tree, graph

struct								       1.2.1								  stack(n)
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