How will the row characters be matched from left to right to the last decimal point using the re?

[#1]

So what's left over on the right-hand side is the non-green part of each row.

Thanks!

[#2 · Accepted solution]

I think you are asking for a regex to match all but the last segment.

regex("aaa.bbb.ccc.ddd","([^\.]+\.)+")

aaa.bbb.ccc.

[^\.] means a single character that is not a period

[^\.]+ means one or more of those characters

[^\.]+\. means match the period

([^\.]+\.)+ means do all that one or more times

[#3]

na1=Regex("aaa.bbb.ccc.ddd","[^\..]+$");

[#4 · Accepted solution]

regex is not the best way to attack this problem.

word(-1,"aaa.bbb.ccc.this is it",".") // "this is it"

will get the last segment efficiently.

word([1 -2],"aaa.bbb.ccc.this is it",".") // "aaa.bbb.ccc"

will get the left part efficiently.