Post History
J, 3 bytes ,|. Try it online! This hook y f (g y) appends y with its reverse.
Answer
#1: Initial revision
by
south
·
2022-02-20T01:01:40Z (almost 3 years ago)
# [J](https://jsoftware.com/#/), 3 bytes ```J ,|. ``` [Try it online!](https://tio.run/##y/r/P03B1kpBp0YPxDJUMOJKUzBWMAGShgYGCkYGBgA) This hook `y f (g y)` appends `y` with its reverse.