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Bash enumerated types

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# 1  
Old 04-01-2012
Bash enumerated types
I have a variable, vbLevel and want to assign it to one of several values which are "none", "low", "medium", "high".

Then I want to do something like

Code:
if [ vbLevel -gt low ]; then
  ...
fi

# 2  
Old 04-01-2012
your text comparing doesn't makes sense to me. Please elaborate more
If you like to perform some action based in text value following code will help you
Code:
for var in none low medium high;
    do
        case $var in   
             none)      
                    <your statements here>
                    ;;   
             low)       
                     <your statements here>
                     ;;   
             medium)  
                    <your statements here>
                    ;;
             high)       
                    <your statements here> 
                    ;;  
        esac
    done

Last edited by 47shailesh; 04-01-2012 at 05:14 PM.. Reason: formatting
# 3  
Old 04-01-2012
You can do this in ksh93 and bash, without the dollar signs I mean...
Code:
none=0 low=1 medium=2 high=3
vbLevel=2
if [[ vbLevel -gt low    ]]; then
  echo hello
fi

This User Gave Thanks to Scrutinizer For This Post:
kristinu
# 4  
Old 04-01-2012
The assign can also be done with the enumerated type let vbLevel=medium
This User Gave Thanks to Chubler_XL For This Post:
kristinu
# 5  
Old 04-01-2012
Indeed. let is an arithmetic evaluation. A synonymous notation would be (ksh/bash):
Code:
(( vbLevel=medium ))

And you can also do this:
Code:
none=0 low=1 medium=2 high=3
vbLevel=2
if (( vbLevel > low )); then
  echo hello
fi

Last edited by Scrutinizer; 04-01-2012 at 07:00 PM..
# 6  
Old 04-01-2012
Quote:
Originally Posted by Scrutinizer
Indeed. let is an arithmetic evaluation. A synonymous notation would be (ksh/bash):
Code:
(( vbLevel=medium ))

And you can also do this:
Code:
none=0 low=1 medium=2 high=3
vbLevel=2
if (( vbLevel > low )); then
  echo hello
fi

So one does not use the $ sign for the variables?
# 7  
Old 04-01-2012
Inside the double parentheses you are allowed to leave the $-signs out if you wish..
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