bash 如何将列表分配给关联数组的值？
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How do I assign a list to the values of an associative array?
提问by mynameisJEFF
This is basically what I am trying to do: to assign a list to the value of an associative array.
这基本上就是我想要做的：将列表分配给关联数组的值。
#!/usr/local/bin/bash
declare -A params
params[n]=(200 400 600 800)
params[p]=(0.2 0.4)
But I got this error:
但我收到了这个错误：
line 4: params[n]: cannot assign list to array member
line 5: params[p]: cannot assign list to array member
Is there any way to get around this problem ?
有什么办法可以解决这个问题吗？
采纳答案by Cyrus
Try this:
尝试这个：
params=([n]="200 400 600 800" [p]="0.2 0.4")
declare -p params
Output:
输出：
declare -A params='([n]="200 400 600 800" [p]="0.2 0.4" )'
回答by anishsane
Essentially, you want 2 dimensional array:
本质上，您需要二维数组：
1st dimension is de-referenced by 'n' or 'p'.
2nd dimension is de-referenced like a normal array.
第一维由“n”或“p”取消引用。
第二维像普通数组一样被取消引用。
bashdoes not support multi-dimensional arrays.
bash不支持多维数组。
You are left with these options:
您只剩下这些选项：
Use combined index as array index in single-dimensional array.
declare -A params params[n,0]=200 params[n,1]=400 params[n,2]=600 params[n,3]=800 params[p,0]=0.2 params[p,1]=0.4Use 2 level dereferencing:
declare -A params #Declare 2 normal arrays. array1=(200 400 600 800) array2=(0.2 0.4) #Use the main array to hold the names of these arrays. params[n]=array1[@] params[p]=array2[@] #use the array. printf "%s\n" "${!params[n]}" printf "%s\n" "${!params[p]}"Good old 2 independent arrays:
param_n=(200 400 600 800) param_p=(0.2 0.4)
使用组合索引作为一维数组中的数组索引。
declare -A params params[n,0]=200 params[n,1]=400 params[n,2]=600 params[n,3]=800 params[p,0]=0.2 params[p,1]=0.4使用 2 级解引用：
declare -A params #Declare 2 normal arrays. array1=(200 400 600 800) array2=(0.2 0.4) #Use the main array to hold the names of these arrays. params[n]=array1[@] params[p]=array2[@] #use the array. printf "%s\n" "${!params[n]}" printf "%s\n" "${!params[p]}"好旧的 2 个独立数组：
param_n=(200 400 600 800) param_p=(0.2 0.4)
Using these methods, you can iterate through the arrays even when the values contain spaces.
使用这些方法，即使值包含空格，您也可以遍历数组。
回答by David C. Rankin
Did you mean to store the lists as elements nand pin an Associative Array? Like this:
您的意思是列表存储为要素n和p关联数组？像这样：
#!/bin/bash
declare -A params
params[n]="200 400 600 800"
params[p]="0.2 0.4"
for i in ${!params[@]}; do
echo "params[$i] = ${params[$i]}"
done
exit 0
Output
输出
$ bash aalist.sh
params[n] = 200 400 600 800
params[p] = 0.2 0.4
