Only change array entries that match predicate

[sschneider-ihre-pvs]

Is there a way where I have a filter function that looks for a certain thing and only edit the filtered entries but keeping also the unchanged entries?
example:

[1,2,3,'a', 4] -> filter(x => typeof x === 'string) -> map(x => parseInt(x, 16)) -> [1,2,3,10,4]

what I am trying to avoid is something like

[1,2,3,'a', 4] -> map(x => typeof x === 'number' ? x : parseInt(x, 16)) -> [1,2,3,10,4]

[sschneider-ihre-pvs]

I was thinking of something like fork/tee or something. because if I filter, I will loose the information about at what index is the value that has been altered so I cannot merge with the original array to overwrite the value.

[selfrefactor]

This case is more about Maybe concept. FP-TS offers such methods. I think I already mentioned it in relation to R.either being used as Either Monad.

Unfortunately, my plans for Rambda are more about fixing existing issues and keeping up with Ramda. But I like your suggestion if you can find such function (as fork) being used elsewhere(other library or language). If you find such case, then I can include the method in Rambdax. Sorry for not being able to be more helpful than that.