Shell Programming and Scripting

#!/bin/bash
read -a unix    #(a c e g)
read -a test     #(b d f)

#! /bin/bash
read -a a1
read -a a2

len1=${#a1[@]}
len2=${#a2[@]}

[ $len1 -lt $len2 ] && len=$len2 || len=$len1

i=0
while [ $i -lt $len ]
do
    printf "%s %s " ${a1[$i]} ${a2[$i]}
    (( i++ ))
done

#!/bin/bash

unix=( a c e g )
test=( b d f )

printf "%s\n" ${unix[@]} >/tmp/1
printf "%s\n" ${test[@]} >/tmp/2

result=$( paste /tmp/1 /tmp/2 )
echo ${result[@]}
rm /tmp/1 /tmp/2

#!/bin/bash

unix=( a c e g )
test=( b d f )

result=$( paste <( printf "%s\n" ${unix[@]} ) <(printf "%s\n" ${test[@]}) )
echo ${result[@]}

sort <<<"$(echo ${unix[@]} ${test[@]}|tr ' ' '\n') "
a
b
c
d 
e
f
g

res=( $(sort <<<"$(echo ${unix[@]} ${test[@]}|tr ' ' '\n') ") )