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Full Discussion: Doubt variable substitution
Top Forums Shell Programming and Scripting Doubt variable substitution Post 302300066 by radoulov on Monday 23rd of March 2009 06:11:24 AM
Old 03-23-2009
You can use arrays.

With ksh93, zsh ans bash:

Code:
vAccounts=(ebsemerg ebsemerg2 ebsemerg3) vNumber=1234567
for ((i=0;i<${#vAccounts[@]};i++)); do 
  printf 'the value of %s is %d\n' "${vAccounts[i]}" $vNumber
done

NB: In Z shell the arrays are 1 based.

Or just foreach:

Code:
vAccounts=(ebsemerg ebsemerg2 ebsemerg3) vNumber=1234567
for e in "${vAccounts[@]}"; do 
  printf 'the value of %s is %d\n' "$e" $vNumber
done

With pre-POSIX shells that don't support arrays natively
you can emulate such structures with positional parameters:

Code:
set -- ebsemerg ebsemerg2 ebsemerg3 
vNumber=1234567
for e in "$@"; do 
  printf 'the value of %s is %d\n' "$e" $vNumber
done

If you want array indexed by strings (not integers), i.e. associative arrays, you'll need a more sophisticated shell like ksh93, zsh or bash4.

With ksh93 you can use the following syntax:

Code:
a=([vAccount1]=ebsemerg [vAccount2]=ebsemer2 [vAccount3]=ebsemer3)
vNumber=1234567

for k in "${!a[@]}"; do
  printf 'the variable %s contains the key %s which has the value %d\n' "$k" "${a[$k]}" $vNumber
done

 

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LEARN ABOUT OPENSOLARIS

let

let(1)								   User Commands							    let(1)

NAME

       let - shell built-in function to evaluate one or more arithmetic expressions

SYNOPSIS

   ksh
       let arg...

   ksh93
       let [expr...]

DESCRIPTION

   ksh
       Each arg is a separate arithmetic expression to be evaluated.

   ksh93
       let  evaluates  each expr in the current shell environment as an arithmetic expression using ANSI C syntax. Variables names are shell vari-
       ables and they are recursively evaluated as arithmetic expressions to get numerical values. let has been made obsolete by the ((...))  syn-
       tax of ksh93(1) which does not require quoting of the operators to pass them as command arguments.

EXIT STATUS

   ksh
       ksh returns the following exit values:

       0    The value of the last expression is non-zero.

       1    The value of the last expression is zero.

   ksh93
       ksh93 returns the following exit values:

       0     The last expr evaluates to a non-zero value.

       >0    The last expr evaluates to 0 or an error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), ksh93(1), set(1), typeset(1), attributes(5)

SunOS 5.11							    2 Nov 2007								    let(1)
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