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call_onced 简介 - 原文链接:https://blog.csdn.net/xijiacun/article/details/71023777 #include <mutex> template <class Fn, class... Args> void call_once(once_f 阅读全文
摘要:
命令read用法 for逐行读和while逐行读是有区别的,如: $ cat file aaaa bbbb cccc dddd $ cat file | while read line; do echo $line; done aaaa bbbb cccc dddd $ for line in $( 阅读全文