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#8
10-09-2008
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I thought of case 1st too, but I was not able to put the expressions together so it would work correctly. Since I was nosy I tried your case script, and it does not work for me either like my former tries with case (just changed $string to $1):
Code:
root@isau02:/data/tmp/testfeld> ./era.ksh ab1cde Pure alpha 
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#9
10-09-2008
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You are correct of course; the matching is greedy, and tries its darndest to find a match, so using a negation between wildcards will find a match if there is a way to match it, regardless of the other characters. So the label "pure alpha" is wrong; it should be "alpha + possibly numbers", or the logic should be changed to do additional cases within that case statement.
Code:
case $string in *[!0-9A-Za-z]*) echo "Not pure alpha + numbers" ;; '') echo "Empty string (duh)" ;; *[0-9]*[!0-9]*|*[!0-9]*[0-9]*) echo "Mixed alpha + numbers" ;; *[!0-9]*) echo "Pure alpha";; *) echo "Pure numbers" ;; esac
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#11
10-10-2008
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It is probably time we started using POSIX character classes in our examples more often!
Code:
#!/bin/bash shopt -s extglob INPUT="123" case $INPUT in ( +([[:digit:]]) ) echo "$INPUT is all numbers" ;; ( +([[:alpha:]]) ) echo "$INPUT is all characters" ;; ( +([[:alnum:]]) ) echo "$INPUT is alphanumeric" ;; ( *) echo "$INPUT is empty or something unknown" ;; esac exit 0
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(though I never needed that yet). But aren't there tools about for everything?! 
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