摘要：
https://stackoverflow.com/questions/918886/how-do-i-split-a-string-on-a-delimiter-in-bash wc: https://unix.stackexchange.com/questions/51945/why-are-w 阅读全文
摘要：
转载自 https://blog.csdn.net/x1269778817/article/details/46535729 参考： https://stackoverflow.com/questions/669452/is-double-square-brackets-preferable-ove 阅读全文