It is pretty useless to show you my pipe as there is only a fetch feed for now.
I have a RSS feed, I want to add a text (actually I want to add [blog]) at the beginning of each item.title.
Which function should I use?
Now, if you want to automatize your pipe (ie, not have to go to the source to change/add feeds), you need to get the location from the elements. based on the only difference in your links, you can get something like this second pipe: pipes.yahoo.com/pipes/pipe.info?_id=7e8cc3482940cc52ddb355b9b2446e58
[about the second prepend method (right side of pipe1): ] using regex not to match a certain pattern but the whole content, just in order to add a preamble, that's an overkill ;) On the left you concatenate string, a very basic operation. if it weren't the yahoo servers that you use to run this simplistic code, and you had a lot of such operations to do, you would go for the string concatenation."
As you talked about a [blog] mark, I guess you want to append that only if the source is a blog, so you'll probably be more interested in the second pipe example.