摘要：
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. You may 阅读全文
posted @ 2016-04-13 23:43
Grandyang
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Write a bash script to calculate the frequency of each word in a text file words.txt. For simplicity sake, you may assume: words.txt contains only low 阅读全文
posted @ 2016-04-13 11:33
Grandyang
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16.1 What's the difference between a thread and a process? 进程Process是程序执行时的一个实例。一个进程是被分配系统资源的独立单元，每个进程在独立的地址空间上执行，如果需要使用其他进程的资源，需要使用进程间通讯，包括管道Pipes，文件 阅读全文
posted @ 2016-04-13 05:27
Grandyang
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