Swapping parts of a string

Let s talk about one of the common regex task that they are extremely good at: swapping string parts. See how capturing groups and backreferences make it an easy job. R code demo included. REGEX FIDDLE: FURTHER LINKS: Suffix to prefix and prefix to suffix in R: Swap groups in Python: Swap text around a character (Notepad++): Sed: How to swap only numeric values in each line: Replacing strings tutorial: