重击获得最后一句

Question

assume, we got the following variable containing a string:

text="All of this is one line. But it consists of multiple sentences. Those are separated by dots. I'd like to get this sentence."

I now need the last sentence "I'd like to get this sentence.". I tried using sed:

echo "$text" | sed 's/.*\\.*\\.//'

I thought it would delete everything up to the pattern .*. . It doesn't.

What's the issue here? I'm sure this can be resolved rather fast, unfortunatly I did not find any solution for this.

Answer 1

Using awk you can do:

awk -F '\\. *' '{print $(NF-1) "."}' <<< "$text"

I'd like to get this sentence.

Using sed:

sed -E 's/.*\.([^.]+\.)$/\1/' <<< "$text"

 I'd like to get this sentence.

Answer 2

Don't forget the built-in

echo "${text##*. }"

This requires a space after the full stop, but the pattern is easy to adapt if you don't want that.

As for your failed attempt, the regex looks okay, but weird. The pattern \\.*\\. looks for zero or more literal periods followed by a literal period, ie effectively one or more period characters.