bash - 如何从bash中的循环创建字符串列表？

Question

我有以下循环:

for chr in {1..3};
do
futureList="${variable1} ${variable2}"
done

我想修改它，以便 futureList 在每个连续循环中附加一组新的变量。预期结果应如下所示:

echo $futureList

string1 string2, string3 string4, string5 string6 etc

Answer 1

这是使用数组的好用例:

var1='string1'
var2='string2'

futureList=() # declare an array

for i in {1..5}; do
   futureList+=("$var1 $var2") # inside loop append value to array
done

# check array content
# decclare -p futureList
# or use printf
printf '%s\n' "${futureList[@]}"

string1 string2
string1 string2
string1 string2
string1 string2
string1 string2