Bash中数组的操作教程

declare -a array

names[0]='zrong'
names[1]='jacky'

names=('zrong' 'jacky')
# 或
names=([0]='zrong' [1]='jacky')

declare -a names

cat>names.txt
zrong
jacky
sweet
Ctrl+C
# 将每一行读取为数组的一个元素
names=(`cat 'names.txt'`)

adobe=('Flash' 'Flex' 'Photoshop')
echo ${adobe[0]}
# 打印
# Flash

adobe=('Flash' 'Flex' 'Photoshop')
echo ${#adobe[@]}
# 打印
# 3

adobe=([0]='Flash' [2]='Flex' [4]='Photoshop')
echo ${#adobe[@]}
# 打印
# 3

adobe=('Flash' 'Flex' 'Photoshop' 'Dreamweaver' 'Premiere')
echo ${adobe[@]:1:3}
# 打印
# Flex Photoshop Dreamweaver
echo ${adobe[@]:3}
# 打印
# Dreamweaver Premiere

adobe=('Flash' 'Flex' 'Photoshop' 'Dreamweaver' 'Premiere')
adobe2=('Fireworks' 'Illustrator')
adobe3=(${adobe[@]} ${adobe2[@]})
echo ${#adobe3[@]}
# 打印
# 7

adobe=('Flash' 'Flex' 'Photoshop' 'Dreamweaver' 'Premiere')
echo ${adobe[@]/Flash/FlashCS5}
# 打印
# 注意，打印的结果是一个字符串列表，不是数组
# FlashCS5 Flex Photoshop Dreamweaver Premiere
#
# 将替换后的值重新保存成数组
adobe=(${adobe[@]/Flash/FlashCS5})

# 删除Photoshop元素
adobe=('Flash' 'Flex' 'Photoshop' 'Dreamweaver' 'Premiere')
adobe=(${adobe[@]:0:2} ${adobe[@]:3})
echo ${adobe[@]}
# 打印
# Flash Flex Dreamweaver Premiere

adobe=('Flash' 'Flex' 'Photoshop' 'Dreamweaver' 'Premiere')
adobe=(${adobe[@]/Photoshop/})
echo ${adobe[@]}
# 打印
# Flash Flex Dreamweaver Premiere

adobe=('Flash' 'Flex' 'Photoshop' 'Dreamweaver' 'Premiere')
for item in ${adobe[@]};do
 echo $item
done
# 打印
# Flash 
# Flex 
# Photoshop 
# Dreamweaver 
# Premiere

adobe=('Flash' 'Flex' 'Photoshop' 'Dreamweaver' 'Premiere')
len=${#adobe[@]}
for ((i=0;i<$len;i++));do
 echo ${adobe[$i]}
done
# 打印
# Flash 
# Flex 
# Photoshop 
# Dreamweaver 
# Premiere