mapOr

mapOr(target, map, or)

Applies a mapping function to a value if it's not null or undefined, otherwise returns a default value. If the target value is null or undefined, it returns the or value. Otherwise, it applies the mapping function and returns the result.

data-first

mapOr(5, (x) => x * 2, 0); // 10
mapOr(null, (x) => x * 2, 0); // 0
mapOr(undefined, (x) => x * 2, -1); // -1

data-last

pipe(
    5,
    mapOr((x) => x * 2, 0),
); // 10

pipe(
    null,
    mapOr((x) => x * 2, 0),
); // 0