是否可以在bash中为稀疏数组设置默认值？

Question

例如，如果我有这个数组：

SourceFolder[0]="inbound1"
SourceFolder[1]="inbound2"
SourceFolder[2]="inbound3"
SourceFolder[100]="inbound100"

我经历过：

for i in "${!SourceFolder[@]}"
do
 echo "SourceFolder: " ${SourceFolder[$i]}
done

是否可以让它为未初始化的索引（3-99）返回一些默认值？

因此，对于从3到99的索引，它将返回，例如，“defaultFolder”

Answer 1

#!/usr/bin/env bash

for i in {0..100}; do
    SourceFolder["${i}"]="defaultFolder"
done

SourceFolder[0]="inbound1"
SourceFolder[1]="inbound2"
SourceFolder[2]="inbound3"
SourceFolder[100]="inbound100"

for i in "${!SourceFolder[@]}"; do
    echo "SourceFolder: ${SourceFolder[$i]}"
done