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如何建立可以從陣列中提取字串的 bash 腳本？

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如何建立可以從陣列中提取字串的 bash 腳本？

我陷入了困境，我正在嘗試編寫一個 Linux bash 腳本，以便它從數組中提取每個字串，並處理結果。

IE

var=("string one" "string two" "string three")

我將如何使用 for 循環來提取每個字串，記住字串有空格，所以我需要提取整個字串，即“字串三”，然後在 fo 循環中，它將處理結果。

例如

#! /bin/bash

clear
SimName=("Welcome" "Testing Region")
echo
echo
echo
echo
#cd dreamgrid/Opensim/bin

# for loop goes here

# processing below
#screen -S "$SimName" -d -m mono OpenSim.exe -inidirectory="Regions/$SimName"  # Needs altering to process each string
#sleep 2
#screen -r "$SimName"   # Needs chaging to show each string in turn.

# echo $SimName[1]   # something test to it with, but needs changing to show each string in turn.

在 BASIC 中很簡單：

DIM A$(2)
A$(1) = "string one"
A$(2) = "string two"
FOR A=1 to 2
C$=A$(A)
FOR DL=1 TO 2000
NEXT
PRINT C$
NEXT

答案1

語法是

for val in "${arr[@]}"; do 
  # something with "$val"
done

前任。

$ arr=("string one" "string two" "string three")
$ for val in "${arr[@]}"; do printf '%s\n' "$val"; done
string one
string two
string three

雙引號"${arr[@]}"使其能夠正確處理包含空格（或更一般地說，當前 中的字元IFS）的元素。從man bash：

                                                                       If
   the word is double-quoted, ${name[*]} expands to a single word with the
   value of each array member separated by the first character of the  IFS
   special variable, and ${name[@]} expands each element of name to a sep‐
   arate word.

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