Reducer: merge lists with modifyList

Performs a shallow merge of new into old using modifyList(). Useful for nested configuration state.

Usage

reducer_merge()

Value

A two-argument function function(old, new).

Examples

r <- reducer_merge()
r(list(a = 1, b = 2), list(b = 99, c = 3))
#> $a
#> [1] 1
#> 
#> $b
#> [1] 99
#> 
#> $c
#> [1] 3
#>