题解 | #格式化输出#

#!/bin/bash

array=($(cat "./nowcoder.txt"))
for (( i=0;i<${#array[@]};i++ ))
do
    echo ${array[i]} | grep -Eo "[0-9]"  | awk 'BEGIN{j=0} {list[j]=$0;j++;} END{for(k=0;k<j;k++){printf "%s",list[k]; if(j>3 && ( (k+1-j%3)%3==0 || k+1==j%3  ) && k!=j-1) printf ","; } print "" }' 
done