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Using pattern lists in Unix

Here is the small reminder about the syntax of the “case” command and the usage of the pattern lists.

#!/bin/ksh print -n "Please enter the line: " read line case "$line" in  ?(dog|cat)  ) print "zero or one occurrence of any pattern" ;;  *(low|high) ) print "zero or more occurrences of any pattern" ;;  @(duncan|methos) […]