UNIX for Dummies Questions & Answers

awk '{A[$1]=$0} END {for ( i in A ) print A[i]}' default generated

#!/bin/ksh
typeset -A settings
cat default generated|
while read option val; do
  settings[$option]=$val
done
for i in "${!settings[@]}"; do
  echo "$i ${settings[$i]}"
done | sort

#!/bin/bash
set -a options
set -a vals
i=0
while read option val; do
  for (( j=0; j<i; j++ )); do
    if [[ ${options[j]} = $option ]]; then
      break
    fi
  done
  options[j]=$option
  vals[j]=$val
  if (( j==i )); then
    (( i++ ))
  fi
done < <(cat  default generated)
for (( j=0; j<i; j++ )); do
  echo "${options[j]} ${vals[j]}"
done

open DFH,"<$ARGV[0]";

while(<DFH>)  {
    ($key, $value) = ( $_ =~ /(^[^ ]*)(.*)$/ );
    $default{$key} = $value;
}

open GFH,"<$ARGV[1]";

while (<GFH>)  {
    ($key, $value) = ( $_ =~ /(^[^ ]*)(.*)$/ );
    $gfh{$key} = $value;
}

$i=0;
while(++$i)  {
    if ( defined $gfh{"Option$i"} )  {
        print "Option$i $gfh{\"Option$i\"}\n";
    } elsif ( defined $default{"Option$i"} )  {
        print "Option$i $default{\"Option$i\"}\n";
    } else {
        exit(0);
    }
}

$ perl t.pl default generatedconfig 
Option1  Value1
Option2  Default Value2
Option3  Value3
Option4  Value4