如何从所有行中删除最后一个字符，但前提是该字符是某个特定字符

Question

i have data in this form

Kure|Hiroshima
Kure|Hiroshima
Kure|Hiroshima
NO MATCHING
Aachen|
Darmstadt
Mulheim
Aachen|

and i want to remove the last character only if it is a pipe (|).

desired output

Kure|Hiroshima
Kure|Hiroshima
Kure|Hiroshima
NO MATCHING
Aachen
Darmstadt
Mulheim
Aachen

Thanks in advance

Answer 1

You can use sed for this:

$ sed 's/|$//' file
Kure|Hiroshima
Kure|Hiroshima
Kure|Hiroshima
NO MATCHING
Aachen
Darmstadt
Mulheim
Aachen

It looks for | together with $ (which means "end of line") and deletes it.

Note you can use sed -i in case you want to do an in-place edit.

Answer 2

awk版本：

awk '{sub(/\|$/,"")}1' file