Description
Given a text file file.txt, transpose its content.
You may assume that each row has the same number of columns and each field is separated by the ' ' character.
Example:
If file.txt has the following content:
name age
alice 21
ryan 30
Output the following:
name alice ryan
age 21 30
Solutions
1. Awk
awk '{
for (i=1;i<=NF;i++){
if (NR==1){
res[i]=$i
}
else{
res[i]=res[i]" "$i
}
}
}
END{
for(j=1;j<=NF;j++){
print res[j]
}
}
' file.txt
# 17/17 cases passed (8 ms)
# Your runtime beats 80.27 % of bash submissions
# Your memory usage beats 100 % of bash submissions (3.5 MB)
2. 什么东西？
columns=$(head -n 1 file.txt | wc -w)
for ((i=1;i<=$columns;i++)); do
cut -d' ' -f $i file.txt | sed -z 's/\n/ /g;s/ $/\n/'
done