ArrayComparison

#!/bin/bash
ar=(10 30 44 44 69 12 11)
IFS=$'\n'
echo "${ar[*]}" | sort -nr | head -n1

array=('d1=(v1 v2 v3)' 'd2=(v1 v2 v3)')
for elt in "${array[@]}";do eval $elt;done
echo "d1 ${#d1[@]} ${d1[@]}"
echo "d2 ${#d2[@]} ${d2[@]}"

array=(23 45 34 1 2 3)
#To refer to a particular value (e.g. : to refer 3rd value)
echo ${array[2]}

#To refer to all the array values
echo ${array[@]}

#To evaluate the number of elements in an array
echo ${#array[@]}

a=(3 5 8 10 6)
b=(6 5 4 12)
c=(14 7 5 7)
quantity=(${#a[@]} ${#b[@]} ${#c[@]})
all=(${a[@]} ${b[@]} ${c[@]})
echo ${a[@]}
echo ${b[@]}
echo ${c[@]}
echo ${quantity[@]}
echo ${all[@]}


echo premiere methode
#trouver l'array la plus longue
max=${quantity[0]}
for n in "${quantity[@]}" ; do
    ((n > max)) && max=$n
done
echo $max
Array3=()
for i in ${a[@]}; do
    for j in ${b[@]}; do
        if [ $i -eq $j ]; then
		for k in ${c[@]}; do
        		if [ $i -eq $k ]; then
				echo $i
				Array3+=($i)
    		                break
			fi
		done
                break
	fi
    done
    #[[ -n $skip ]] || Array3+=("$i")
done
#declare -p Array3
echo ${Array3[@]}

echo deuxieme methode plus rapide
d=($(echo "${a[@]}" | tr ' ' '\n' | sort -u | tr '\n' ' '))
e=($(echo "${b[@]}" | tr ' ' '\n' | sort -u | tr '\n' ' '))
f=($(echo "${c[@]}" | tr ' ' '\n' | sort -u | tr '\n' ' '))

echo ${d[@]}
echo ${e[@]}
echo ${f[@]}

g=($(echo "${d[@]}" "${e[@]}" | tr ' ' '\n' | sort | uniq -d | tr '\n' ' '))
h=($(echo "${g[@]}" "${f[@]}" | tr ' ' '\n' | sort | uniq -d | tr '\n' ' '))
echo ${h[@]}