LinuxQuestions.org - [SOLVED] Bash: Making a Variable out of two other variables.

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youarefunny

03-18-2010 05:44 PM

Bash: Making a Variable out of two other variables.

I need to find the value of:

Code:

$Namenumber

My script asks for the name you want to look up and I want it to return the value of $Namenumber

I was thinking:

Code:

number=$"$name"number

but this returns

Code:

$Namenumber

but does not actually resolve what the variable $Namenumber is equal to.

How would you do this?
Thank you

primerib

03-18-2010 06:04 PM

I'm not sure what exactly you're asking but if you just want to join $name and $number into a single variable then:
number="$name$number"

If you just want to know what $Namenumber holds then:
echo "$Namenumber"

Otherwise can you restate your question so it's more clear?

grail

03-18-2010 07:32 PM

I am guessing you are looking for an indirect reference, so you need one more step:

Code:

timnumber=10

name="tim"

namenumber="${name}number"



echo "${!namenumber}" # or eval echo \$$namenumber

youarefunny

03-29-2010 04:30 PM

Thankyou

The secret is eval echo.

Code:

query='$'"$name"number

return=$(eval echo $query)

grail

03-29-2010 06:56 PM

Don't forget to mark as SOLVED

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