这是一个 awk 解决方案:
BEGIN{
RS=""
FS="\n"
}
FNR==NR&&FNR>1{
for (i=1;i<=NF;i++) {
split($i,d,"|")
if (d[1] > max)
max = d[1]
}
next
}
FNR>1&&!header{
printf "%s\t","fields >"
for (i=1;i<=max;i++)
printf "%s\t",i
print ""
header=1
}
FNR>1{
printf "record%s\t\t",FNR-1
for (i=1;i<=NF;i++) {
split($i,d,"|")
val[d[1]] = d[2]
}
for (i=1;i<=max;i++)
printf "%s\t",val[i]?val[i]:"NULL"
print ""
delete val
}
另存为script.awk
并运行(注意它使用两遍方法,因此您需要两次提供文件):
$ awk -f script.awk file file
fields > 1 2 3 4
record1 a g f NULL
record2 m n k NULL
record3 d a s r
将该行添加5|b
到第一个记录中file
给出输出:
$ awk -f script.awk file file
fields > 1 2 3 4 5
record1 a g f NULL b
record2 m n k NULL NULL
record3 d a s r NULL