Uses for MapAll ( //@ )

Question

The function MapAll was seen as important enough to warrant the short form //@, yet I rarely use it, especially compared to others like /@

Answer 1

I don't use it, but has some fun behavior for Listable functions. For example:

If you want each element in a list to have a function applied to it a number of times depending on its nested depth in the list, I guess this the only time I've seen it used.

SetAttributes[f, Listable]

(f //@ {{a}, {{b}}, c}) // Flatten

    {f[f[f[a]]], f[f[f[f[b]]]], f[f[c]]}

Generally though I would imagine you could use ReplaceAll whenever you would use this.