我想写一个循环15个字符串的脚本(可能是数组?)这可能吗?
类似于:
for databaseName in listOfNames
then
# Do something
end
我想写一个循环15个字符串的脚本(可能是数组?)这可能吗?
类似于:
for databaseName in listOfNames
then
# Do something
end
当前回答
您可以这样使用:
## declare an array variable
declare -a arr=("element1" "element2" "element3")
## now loop through the above array
for i in "${arr[@]}"
do
echo "$i"
# or do whatever with individual element of the array
done
# You can access them using echo "${arr[0]}", "${arr[1]}" also
也适用于多行数组声明
declare -a arr=("element1"
"element2" "element3"
"element4"
)
其他回答
listOfNames="db_one db_two db_three"
for databaseName in $listOfNames
do
echo $databaseName
done
或者只是
for databaseName in db_one db_two db_three
do
echo $databaseName
done
这些答案中没有一个包含计数器。。。
#!/bin/bash
## declare an array variable
declare -a array=("one" "two" "three")
# get length of an array
arraylength=${#array[@]}
# use for loop to read all values and indexes
for (( i=0; i<${arraylength}; i++ ));
do
echo "index: $i, value: ${array[$i]}"
done
输出:
index: 0, value: one
index: 1, value: two
index: 2, value: three
如果您使用的是Korn shell,则有“set-A databaseName”,否则有“declare-A databaseName”
要在所有外壳上编写脚本,
set -A databaseName=("db1" "db2" ....) ||
declare -a databaseName=("db1" "db2" ....)
# now loop
for dbname in "${arr[@]}"
do
echo "$dbname" # or whatever
done
它应该在所有外壳上工作。
试试这个。它正在运行和测试。
for k in "${array[@]}"
do
echo $k
done
# For accessing with the echo command: echo ${array[0]}, ${array[1]}
每个Bash脚本/会话的可能第一行:
say() { for line in "${@}" ; do printf "%s\n" "${line}" ; done ; }
使用例如:
$ aa=( 7 -4 -e ) ; say "${aa[@]}"
7
-4
-e
可以考虑:echo在此处将-e解释为选项