shell dict 操作

shell 读取文件，利用dict 合并第一列 。

#!/bin/bash
result_file="a"
declare -A mydict

total=`cat ${result_file}.bak| wc -l `
count=0
 
#cat ${result_file}.bak | while read campid devid needmd5
while read campid devid needmd5
do
   #echo "$campid   devid: $devid   "
   if [ -z "${mydict[$devid]}" ]; then
        #echo "if  $devide "
        #mydict=([$devid]=$campid)
    #export
    mydict+=([$devid]="$campid")
        echo "aaafter mydict keys  ${!mydict[*]}   "
    else
        #$mydict[$devid]+="," + $campid
    mydict+=([$devid]+=","$campid)
    fi

((count+=1))
#文件读结束时候输出所有keys
if [ $count -eq $total  ]; then
  echo "count :  $count "
  echo "bbbfter mydict keys  ${!mydict[*]}   "
fi
echo "before return ${!mydict[*]}  "
done <  ${result_file}.bak


echo "before return ${!mydict[*]}  "
 
 
#echo ${!mydic[*]}
echo "after mydict keys  ${!mydict[*]}   "

echo "ccc  $ccc "
for key in $(echo ${!mydict[*]})
do
        echo " k：  $key : ${mydict[$key]}"
done

开始读时候用 cat ${result_file}.bak | while read campid devid needmd5 的形式，最后

mydict的keys 一直为空，最后薛大佬帮忙修改为从文件中读 不用管道的形式解决。

a.bak 文件内容

188302021 b20892db-485d-4ae9-af77-f75791af824a 0
183935026 DC3FC748-EAFD-4D4A-8F64-B9F3517EF549 0
183935026 9B9E985A-3F1F-4D76-A15E-E5B79F5E85FD 0
183935026 75E9144A-2A42-4F32-973D-BF77DF5A25AF 0