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Asked: 2026-06-06T22:14:14+00:00

I’m playing with using Regex to modify Twitter posts. I’m currently attempting to trim

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I’m playing with using Regex to modify Twitter posts. I’m currently attempting to trim each tweet up to (but not including) the last occurrence of a retweet string (example: RT @Sam:). I’m already filtering my feed so that only tweets containing at least one retweet string are kept. The regex I’m using to do this is RT @[A-Za-z0-9_]+:.

So, my question is, simply, how can I trim (cut off) each string up to, but not including, the last occurrence of RT @[A-Za-z0-9_]+:?

So, for example:

RT @Sam: Look what Susan said. RT @Susan: Hello!

should end up as:

RT @Susan: Hello!

(In case it’s helpful, I’m using Yahoo! Pipes for this experiment.)

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1 Answer

  1. Editorial Team

    Use regex (RT @(?!.*@).+:.+) to find the match…

    Negative lookahead (?!.*@) is a condition that says there is no @ beyond this point.

    Test it here.

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