Replacing certain parts of strings with microflows

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Can anyone tell me how (if) it is possible to use microflow to 'look up' certain parts of a string and replace it with variables that are available in microflow? E.g. I have a string (Email signature) that contains $$Displayname$$ that I want to replace with the username of the current users
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2 answers
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You can use the replaceAll function in a microflow expression.

Signature: replaceAll(string, regular expression, replacement)

Example:

replaceAll('Hello Jim', 'Hello', 'Hi') results in "Hi Jim"

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Brilliant! What happens if 'Hello Jim' is not present in the string?

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