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Full Discussion: How to print elements between letters bash script?
Top Forums Shell Programming and Scripting How to print elements between letters bash script? Post 302929095 by Ophiuchus on Wednesday 17th of December 2014 04:24:08 PM
Old 12-17-2014
How to print elements between letters bash script?
Hello to all,

May somebody help me to fix my bash code below, I'd like to do it only using loops and if statements is possible.

I the content of the arrays are represented by the following 2 strings, where each character is an element inside the array.

String for case 1:
Code:
81UV78UV183UV89800

String for case 2:
Code:
8U1UVV78UUV18UU3UV89800

The strings are separated by "U" followed by "V", this is "UV", but sometimes U or V appears alone (not in sequence UV). I want to print the elements between UV concatenated in a single string.

For String 1 the array is 1rst one and the output would be:
Code:
81
78
183
89800

and I'm only getting 81, 78 and 89800.

for String 2 the array is 2nd one "commented" and the output would be:
Code:
8U1
V78U
18UU3
89800

and I'm only getting 8, 78 and 18.

The code I have so far is:
Code:
#!/bin/bash
 
#String 1 (81UV78UV183UV89800) represents content of  this array
a[0]=8;a[1]=1;a[2]=U;a[3]=V;a[4]=7;a[5]=8;a[6]=U;
a[7]=V;a[8]=1;a[9]=8;a[10]=3;a[11]=U;a[12]=V;
a[13]=8;a[14]=9;a[15]=8;a[16]=0;a[17]=0;
 
#String 2 (8U1UVV78UUV18UU3UV89800) represents content of  this array
#a[0]=8;a[1]=U;a[2]=1;a[3]=U;a[4]=V;a[5]=V;a[6]=7;a[7]=8;
#a[8]=U;a[9]=U;a[10]=V;a[11]=1;a[12]=8;a[13]=U;a[14]=U;a[15]=3;a[16]=U;
#a[17]=V;a[18]=8;a[19]=9;a[20]=8;a[21]=0;a[22]=0;
 
for (( i=0; i<${#a[@]}; i++))
do
 if [ "${a[$i]}" == "U" ]; then
  c=1
 elif [ "${a[$i]}" == "V" ]; then
  c=0
  if (( ${#buff} > 0 )); then
   echo ${buff}
   buff=""
  fi
 elif (( c == 0 )); then
  buff=${buff}${a[$i]}
 fi
done

PS: The data is stored in arrays initially but I show you the way the data looks in a string for you to understand better. I'm using Cygwin.

Thanks in advance for any help.
Last edited by jim mcnamara; 12-17-2014 at 05:35 PM..
 

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LEARN ABOUT CENTOS

bashbug

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

       TMPDIR Directory in which to create temporary files and directories.

SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
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