如何去掉文本最后一行的最后一个字符

标签：sed

问题：

最近接触文本处理遇见了问题

{"X":40.172819,"Y":116.383621,"Z":.0117,"T":"2016-04-26 16:00:00"},
{"X":39.760256,"Y":116.305211,"Z":.2923,"T":"2016-04-26 16:00:00"},
{"X":39.959291,"Y":116.32090099999999,"Z":.3288,"T":"2016-04-26 16:00:00"},
{"X":40.019980999999994,"Y":116.339131,"Z":.2475,"T":"2016-04-26 16:00:00"},
{"X":39.983142,"Y":116.303713,"Z":1.155,"T":"2016-04-26 16:00:00"},

现在我想把最后一行结尾的逗号（,）去掉

解答：

sed ‘s/.$//‘ file
{"X":40.172819,"Y":116.383621,"Z":.0117,"T":"2016-04-26 16:00:00"}
{"X":39.760256,"Y":116.305211,"Z":.2923,"T":"2016-04-26 16:00:00"}
{"X":39.959291,"Y":116.32090099999999,"Z":.3288,"T":"2016-04-26 16:00:00"}
{"X":40.019980999999994,"Y":116.339131,"Z":.2475,"T":"2016-04-26 16:00:00"}
{"X":39.983142,"Y":116.303713,"Z":1.155,"T":"2016-04-26 16:00:00"}

awk ‘{sub(/.$/,"")}1‘ file
{"X":40.172819,"Y":116.383621,"Z":.0117,"T":"2016-04-26 16:00:00"}
{"X":39.760256,"Y":116.305211,"Z":.2923,"T":"2016-04-26 16:00:00"}
{"X":39.959291,"Y":116.32090099999999,"Z":.3288,"T":"2016-04-26 16:00:00"}
{"X":40.019980999999994,"Y":116.339131,"Z":.2475,"T":"2016-04-26 16:00:00"}
{"X":39.983142,"Y":116.303713,"Z":1.155,"T":"2016-04-26 16:00:00"}

本文出自 “八英里” 博客，请务必保留此出处http://5921271.blog.51cto.com/5911271/1768487

如何去掉文本最后一行的最后一个字符

标签：sed

原文地址：http://5921271.blog.51cto.com/5911271/1768487