Function MapError

rivershared/util/sliceutil/slice_util.go:61–73

MapError manipulates a slice and transforms it to a slice of another type, returning the first error that occurred invoking the map function, if there was one.

(collection []T, mapFunc func(T) (R, error))

// returning the first error that occurred invoking the map function, if there
// was one.
func MapError[T any, R any](collection []T, mapFunc func(T) (R, error)) ([]R, error) {
	result := make([]R, len(collection))

	for i, item := range collection {
		var err error
		result[i], err = mapFunc(item)
		if err != nil {
			return nil, err
		}
	}

	return result, nil
}

// Uniq returns a duplicate-free version of an array, in which only the first occurrence of each element is kept.
// The order of result values is determined by the order they occur in the array.