描述

Given a text file file.txt that contains list of phone numbers (one per line), write a one liner bash script to print all valid phone numbers.

描述

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.

描述

Given a text file file.txt, print just the 10th line of the file.

描述

Given an array of integers, return indices of the two numbers such that they add up to a specific target.
You may assume that each input would have exactly one solution, and you may not use the same element twice.

hexo 是一个静态博客生成框架，采用nodejs编写，可以把markdown文件编译成html，并提交到git服务器。