【leetcode-shell】Tenth Line

随便找了一个shell脚本的题目。

打印出第十行的内容。

解法一：循环，不过效率最差，排在了最后

# Read from the file file.txt and output the tenth line to stdout.
#!/bin/bash

declare count=0

cat file.txt | while read line
do
    if [ $count = 9 ];then
        echo $line
        exit 0
    fi
    let count=$count+1
done

解法二：sed，最快速，也最简洁

# Read from the file file.txt and output the tenth line to stdout.
#!/bin/bash

sed -n 10p file.txt