【LeetCode】shell
195. Tenth Line
输出file.txt中的第十行
答案:
# Read from the file file.txt and output the tenth line to stdout. #!/bin/bash cat file.txt | sed -n '10p'
193. Valid Phone Numbers
找出file.txt中符合(xxx) xxx-xxxx or xxx-xxx-xxxx格式的电话号码
答案:
1 cat file.txt | grep '^(\([0-9]{3}\) )[0-9]{3}-[0-9]{4}$|^([0-9]{3}-){2}[0-9]{4}$'