是否有可能设置在bash稀疏数组的默认值？ [英] Is it possible to set a default value for sparse array in bash?

问题描述

例如，如果我有这样的数组：

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

和我通过它：

 为我在$ {！SourceFolder [@]}
做
 回声SourceFolder：$ {SourceFolder [$ i]}
DONE
 

是否有可能使其返回一些默认值未初始化索引（3-99）？

因此​​，从3到99的索引它将返回，例如，defaultFolder

解决方案

 ＃！的/ usr / bin中/ env的庆典因为我在{0..100};做
    SourceFolder [$ {I}] =defaultFolder
DONESourceFolder [0] =inbound1
SourceFolder [1] =inbound2
SourceFolder [2] =inbound3
SourceFolder [100] =inbound100因为我在$ {SourceFolder [@]！};做
    回声SourceFolder：$ {SourceFolder [$ i]}
DONE
 

for example, if I have this array:

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

And I go through it:

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

Is it possible to make it to return some default value for not initialized indexed (3-99)?

so, for indexes from 3 to 99 it will return, for instance, "defaultFolder"

解决方案

#!/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

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