Matching only the strings I provide - sed - SOLVED
Hello..
I am currently learning sed and have found myself in some trouble..
I wrote this command:
and some of the output i get is :
As you can see, at the very end, it does not end with stockholm/paris/tokyo, because it still matches those extra letters because of my patter, now, how would I change my pattern to avoid these troubles ?
I tried (stockholm|tokyo|paris) but then I dont get the last city, stockholmpi for example (it should be stockholm only).
EDIT: Here is some of the data I use:
EDIT After RudiC's post:
Okay so the logic behind this pattern is,
1. It starts with a '->' or a '<-' followed by a city, example; ->tokyo.
2. After the city comes another arrow followed by another city, example; ->tokyo->paris.
3. Then again, an arrow, followed by a city, example; ->tokyo->paris<-tokyo.
4. Then some random texts come between, if you look at the last line in the data ive posted, you can see that after " ->tokyo->paris<-tokyo" comes "Jan" which is random text, we dont want this.
5. Then we meet our pattern again, same pattern as the previous.
This is the ideal result: ->tokyo->paris<-tokyo->paris<-stockholm->tokyo
Which I do get on this specific line, but on some other lines I get output like this:
And we see that the third city has two extra letters (pi) and the last city, has two extra letters (pi), that is because in my pattern i write :
which in turn matches 'p' and 'i' from paris.
Now how would I force sed to choose between the exact strings I provided, which is stockholm,paris and tokyo ?
EDIT: Solved it by using parantheses. Here is the solution:
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