Evaluate a ternary maybe returning function on three maybe values
Usage
and_then3(.m1, .m2, .m3, .f, ...)
Arguments
- .m1
A maybe value
- .m2
A maybe value
- .m3
A maybe value
- .f
A ternary maybe returning function to apply to the maybe values
- ...
Named arguments for the function .f
Examples
safe_sum <- maybe(function(x, y, z) sum(x, y, z))
and_then3(just(1), just(2), just(3), safe_sum)
#> Just
#> [1] 6
and_then3(nothing(), just(2), just(3), safe_sum)
#> Nothing