ksh : find value type

madmat · #1 (**permalink**) 09-19-2005

Hi,

Simple question :
How to find the value type from a variable :
Ex : var="1" => type is numeric
var="a" => type is character

Thx

vino · #2 (**permalink**) 09-21-2005

Have a look at this

Code:

$ cat mad.ksh            
#! /bin/ksh

[[ -z "$1" ]] && echo "I cant work without an input" && exit 1

INPUT="$@"

[[ "$INPUT" == ?(+|-)+([0-9]) ]] && echo "$INPUT is numeric" && exit 0

[[ "$INPUT" == +([a-zA-Z]) ]] && echo "$INPUT is character" && exit 0

[[ "$INPUT" == *([0-9]|[a-zA-Z])* ]] && echo "$INPUT is alpha-numeric" && exit 0

Code:

$ ./mad.ksh 123
123 is numeric
$ ./mad.ksh abc 
abc is character
$ ./mad.ksh abc123
abc123 is alpha-numeric

Not very perfect. Atleast will get you started.

-vino

madmat · #3 (**permalink**) 09-21-2005

Hi vino
Funny code

Thx for it, I'll find some ideas for my problem.
Rgds

fnds · #4 (**permalink**) 04-10-2009

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