- 定义数组
[chengmo@centos5 ~]$ a=(1 2 3 4 5)
[chengmo@centos5 ~]$ echo $a
1
[chengmo@centos5 ~]$ a=([1]=aaa [2]=bbb [c]=ccc)
[chengmo@centos5 ~]$ echo ${a[c]}
ccc
[chengmo@centos5 ~]$ b[1]=100
[chengmo@centos5 ~]$ echo ${b[1]}
100
[chengmo@centos5 ~]$ a="one two three" # echo ${array[0|@|*]},把array变量当作数组来处理,但数组元素只有字符串本身 - 读取与赋值
得到长度(用${#数组名[@或*]} 可以得到数组长度):
[chengmo@centos5 ~]$ echo ${#a[@]}
5读取(用${数组名[下标]} 下标是从0开始 下标是:*或者@ 得到整个数组内容):
[chengmo@centos5 ~]$ echo ${a[2]}
3
[chengmo@centos5 ~]$ echo ${a[*]}
1 2 3 4 5赋值(直接通过 数组名[下标] 就可以对其进行引用赋值,如果下标不存在,自动添加新一个数组元素):
[chengmo@centos5 ~]$ a[1]=100
[chengmo@centos5 ~]$ echo ${a[*]}
1 100 3 4 5
[chengmo@centos5 ~]$ a[5]=100
[chengmo@centos5 ~]$ echo ${a[*]}
1 100 3 4 5 100删除(直接通过:unset 数组[下标] 可以清除相应的元素,不带下标,清除整个数据):
[chengmo@centos5 ~]$ a=(1 2 3 4 5)
[chengmo@centos5 ~]$ unset a
[chengmo@centos5 ~]$ echo ${a[*]}[chengmo@centos5 ~]$ a=(1 2 3 4 5)
[chengmo@centos5 ~]$ unset a[1]
[chengmo@centos5 ~]$ echo ${a[*]}
1 3 4 5
[chengmo@centos5 ~]$ echo ${#a[*]}
4 - 特殊使用
分片(直接通过 ${数组名[@或*]:起始位置:长度} 切片原先数组,返回是字符串,中间用“空格”分开,因此如果加上”()”,将得到切片数组,上面例子:c 就是一个新数据):
[chengmo@centos5 ~]$ a=(1 2 3 4 5)
[chengmo@centos5 ~]$ echo ${a[@]:0:3}
1 2 3
[chengmo@centos5 ~]$ echo ${a[@]:1:4}
2 3 4 5
[chengmo@centos5 ~]$ c=(${a[@]:1:4})
[chengmo@centos5 ~]$ echo ${#c[@]}
4
[chengmo@centos5 ~]$ echo ${c[*]}
2 3 4 5替换(调用方法是:${数组名[@或*]/查找字符/替换字符} 该操作不会改变原先数组内容,如果需要修改,可以看上面例子,重新定义数据):
[chengmo@centos5 ~]$ a=(1 2 3 4 5)
[chengmo@centos5 ~]$ echo ${a[@]/3/100}
1 2 100 4 5
[chengmo@centos5 ~]$ echo ${a[@]}
1 2 3 4 5
[chengmo@centos5 ~]$ a=(${a[@]/3/100})
[chengmo@centos5 ~]$ echo ${a[@]}
1 2 100 4 5
[chengmo@centos5 ~]$ array=( [0]=one [1]=two [2]=three [3]=four )
[chengmo@centos5 ~]$ echo ${array[@] /o/m} #第一个匹配的会被删除
mne twm three fmur
[chengmo@centos5 ~]$ echo ${array[@] //e/f} #所有匹配的会被删除
onf two thrff four
[chengmo@centos5 ~]$ echo ${array[@] //o/} #没有指定替换子串,则删除匹配到的子符
ne tw three fur
[chengmo@centos5 ~]$ echo ${array[@] /#o/k} #替换字符串前端子串
kne two three four
[chengmo@centos5 ~]$ echo ${array[@] /%o/k} #替换字符串后端子串
one twk three four