bash で配列比較

2つの配列から重複している要素だけを取り出すスクリプトメモ

#!/bin/bash

array1=("hoge" "fuga" "foo" "bar" "barbar" "1" "hogehoge" "temp" "varvar")
array2=("varvar" "hoge" "fuga" "foo" "barbar" "2" "123" "tmp" "varvarvar" "1")

echo ${array1[@]}
echo ${array2[@]}

for p in ${array1[@]}; do
  for q in ${array2[@]}; do
    if [ "${p}" = "${q}" ]; then
      array3+=(${p})
    fi
  done
done


echo ${array3[@]}

実行例

./arraycompare.sh
hoge fuga foo bar barbar 1 hogehoge temp varvar
varvar hoge fuga foo barbar 2 123 tmp varvarvar 1
hoge fuga foo barbar 1 varvar