leetcode 194. Transpose File

题目链接：leetcode

# Read from the file file.txt and print its transposed content to stdout.
awk '
{
    for (i = 1; i <= NF; i++) {
        if (FNR == 1) {
            t[i] = $i;
        } else {
            t[i] = t[i] " " $i
        }
    }
}
END {
    for (i = 1; t[i] != ""; i++) {
        print t[i]
    }
}
' file.txt