在文本文件中连接具有特定模式的行

Question

I'm trying to join rows based on the first value in a row. My file looks like this:

the structure is: ID, KEY, VALUE

1 1 Joe
1 2 Smith
1 3 30
2 2 Doe
2 1 John
2 3 20

The KEY stands for some kind of attribute of the ID, in this case KEY '1' is first name, '2' is surname and '3' is age.

The output should look like this:

1 Joe Smith 30
2 John Doe 20

I know that this can be done by fairly simple awk script, but I'm having trouble finding it on SO or with Google.

Answer 1

{
    a[$1,$2]=$3
    if ($1>m) {m=$1}
}
END {
    for(i=1;i<=m;i++)
    {
        j=1
        printf i " "
        while (a[i,j] != "")
        {
            printf a[i,j] " "
            j++
        }
    printf "\n"
    }
}

Answer 2

这个awk命令应该工作：

awk '$2==1{fn=$3} $2==2{ln=$3} $2==3{age=$3} NR>1 && NR%3==0 {print $1,fn,ln,age}' file

Answer 3

awk一种方式

awk '{a[$1]=(a[$1])?a[$1]FS$3:$3}END{for(;x<length(a);)print ++x,a[x]}' <(sort -nk12 file)