问Bash读取CSV文件中的所有列并在每一行中显示空白单元格

EN

awk -F\; '
    {TMP = ""
     for (i=1; i<=NF; i++) if ($i == "") TMP = sprintf ("%s,%c", TMP, 64+i)
     print substr (TMP,2)
    }
' /test1.csv
B,F,H
A,G,H

A,C,F

    awk -F\; '
    NR == 1 {MX = split ($0, HDR)
             next
            }
            {TMP = ""
             for (i=1; i<=MX; i++) if ($i == "") TMP = sprintf ("%s,%s", TMP, HDR[i])
             print substr (TMP,2)
            }
    ' file
banana
rachel
banana
rachel,monica,chandler,joey,janice,banana
rachel,monica,chandler,joey,banana

BEGIN {FS=OFS=","}
{
    if (NR == 1)
        split($0, hdr)

        if (nr) {nr = 0; print("")}
        for(f=1; f<=NF; f++)
            if ($f == "") {
                if (!nr)
                    printf("%s", hdr[f])
                else
                    printf("%c%s", OFS, hdr[f])
                nr = 1
            }
}

BEGIN {FS = OFS = ","}

NR == 1 {
        printf("%s%c%s\n", $0, OFS, "BANANA")
        split($0, hdr)
        next
}

{
        for(f = 1; f <= NF; f++)
            if ($f == "") {
                printf("%s%c%s\n", $0, OFS, hdr[f])
                break
            }
}

awk '
BEGIN { FS=";" }
NR==1 {
        for(i = 1; i <= NF; i++) { heads[i]=$i; }
      }

      { for(i = 1; i <= NF; i++) {
          if ($i == "") { printf "%s ",heads[i] }
        }
        print "";
      } 
'