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Error in eval eval command to print html tags

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# 8  
Old 03-28-2013
Quote:
Originally Posted by vivek d r
found one more issue with eval :-(
Again, a quoting issue.

set -x will help you find your way through eval.

Regards,
Alister
# 9  
Old 03-28-2013
alister, i tredi set -x...

from the output its apparant that

Code:
eval jvmCPU2=Not able to fetch HQE value....May be HQE Not running

now why is it taking only first word and throwing an error from second word onwards... i know i might be asking some silly stuff. but i am new to this eval command...

Code:
++ zoneCounter=2
+++ cat TACHCAutomation.OutputZ2
+++ grep CCM-JVM-CPU:
+++ awk -FCCM-JVM-CPU: '{print $2}'
++ temp=' Not able to fetch HQE value....May be HQE Not running'
+++ echo Not able to fetch HQE value....May be HQE Not running
++ eval eval jvmCPU2=Not able to fetch HQE value....May be HQE Not running
+++ eval jvmCPU2=Not able to fetch HQE value....May be HQE Not running
++++ jvmCPU2=Not
++++ able to fetch HQE value....May be HQE Not running
./sample.sh: line 16: able: command not found

# 10  
Old 03-28-2013
Quote:
Originally Posted by vivek d r
i think i dint explain properly.. here $optUsage$zoneCount is a single variable.... when formed properly it will be either variable optUsage1, optUsage2, optUsage3 which may hold any different values... for this reason i tried with eval command
Make your life easier and don't send eval any text that doesn't require multiple passes through the parser. If all you need eval for is to expand a variable, don't send entire lines of html.

Code:
result=$(eval echo \$optUsage$zoneCount)

You can then use $result wherever you need it.

Regards,
Alister
# 11  
Old 03-28-2013
okay thanks will try to implement it this way.... so result will act as a pointer is it...

by the way how to set values to the result , i tried setting some parameter to result so that the variable pointed to by this result variable gets this value.. but i am having trouble with the syntax to store content to this pointer...

Code:
vivek@vivek-c5e55ef2e ~/TAC
$ result=$( echo eval \$optUsage$zoneCount )

vivek@vivek-c5e55ef2e ~/TAC
$ echo $result
eval $optUsage1

vivek@vivek-c5e55ef2e ~/TAC
$

vivek@vivek-c5e55ef2e ~/TAC
$ eval $result=123vivek
-bash: 2%=123vivek: command not found

vivek@vivek-c5e55ef2e ~/TAC

# 12  
Old 03-28-2013
Quote:
Originally Posted by vivek d r
Code:
vivek@vivek-c5e55ef2e ~/TAC
$ result=$( echo eval \$optUsage$zoneCount )

I made a mistake in my original post. You must have read it before I made the edit. "eval" should precede "echo".

Regards,
Alister
# 13  
Old 03-28-2013
okay got it... issue resolved.. thanks alister.. thanks corona.. :-)
# 14  
Old 03-28-2013
Another option would be to use associative arrays, where you can do things like array["string"]="value" which you can look up later without eval tricks. Modern KSH supports these.
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