数组的值赋给变量bash脚本 [英] Assigning the value of an array to a variable bash script
问题描述
我想请教一下我使用二维数组元素的值赋给变量的语法。这基本上是什么,我要做的:我有字符的2维数组和字符串名为SUB_STRING,获取数组中某元素的值,并把它称为whole_string另一个字符串
为((J = 1; J< = NUM_COLUMNS; J ++))做
为((i = 1; I< = NUM_ROWS;我++))做
在阵列矩阵中的元素[I,J]的值分配给子
字符串
块引用>whole_string =$ whole_String $ SUB_STRING
DONE
DONE我想知道如何将数组的值分配给子字符串我有。谢谢
解决方案通过电流的bash您可以将一个关联数组来创建多维数组。
#!/斌/庆典声明-A A#声明关联数组
NUM_ROWS = 7
NUM_COLUMNS = 9#填充阵列
为((J = 1; J< = NUM_ROWS; J ++))做
为((i = 1; I< = NUM_COLUMNS;我++))做
A [附加$ J,$ i] =$ Y:$ I#填补行:列
DONE
DONE#打印数组
为((J = 1; J< = NUM_ROWS; J ++))做
为((i = 1; I< = NUM_COLUMNS;我++))做
回声-n$ {A [附加$ J,$ I]}
DONE
回声
DONE输出(9×7阵列):
1:1 1:2 1:3 1:4 1:5 1:6 1:7 1:8 1:9
2:1 2:2 2:3 2:4 2:5 2:6 2:7 2:8 2:9
3:1 3:2 3:3 3:4 3:5 3:6 3:7 3:8 3:9
4:1 4:2 4:3 4:4 4:5 4:6 4:7 4:8 4:9
5:1 5:2 5:3 5:4 5:5:6 5 7 5 8 5:9
6:1 6:2 6:3 6:4 6:5 6:6 6:7 6:8 6:9
7:1 7:2 7:3 7:4 7:5 7:6 7:7:8 7:9I want to ask about the syntax i use to assign a value of a two dimensional array element to a variable. this is basically what i am trying to do: I have a 2 dimensional array of characters and a string called sub_string that gets the value of a particular element in the array and put it in another string called whole_string
for ((j=1;j<=num_columns;j++)) do for ((i=1;i<=num_rows;i++)) do
Assigning the value of the element [i,j] in the array matrix to a sub string
whole_string="$whole_String$sub_string" done done
I want to know how to assign the value of the array to the sub string i have. thank you
解决方案With a current bash you can divert an associative array to create multidimensional arrays.
#!/bin/bash declare -A A # declare associative array A num_rows=7 num_columns=9 # fill array for ((j=1;j<=num_rows;j++)) do for ((i=1;i<=num_columns;i++)) do A[$j,$i]="$j:$i" # fill with row:column done done # print array for ((j=1;j<=num_rows;j++)) do for ((i=1;i<=num_columns;i++)) do echo -n "${A[$j,$i]} " done echo done
Output (9x7 array):
1:1 1:2 1:3 1:4 1:5 1:6 1:7 1:8 1:9 2:1 2:2 2:3 2:4 2:5 2:6 2:7 2:8 2:9 3:1 3:2 3:3 3:4 3:5 3:6 3:7 3:8 3:9 4:1 4:2 4:3 4:4 4:5 4:6 4:7 4:8 4:9 5:1 5:2 5:3 5:4 5:5 5:6 5:7 5:8 5:9 6:1 6:2 6:3 6:4 6:5 6:6 6:7 6:8 6:9 7:1 7:2 7:3 7:4 7:5 7:6 7:7 7:8 7:9
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