Folds all traversal arguments from left to right with the provided operator, if any.
Folds all traversal arguments from left to right with the provided operator, if any.
folding result type
start value
folding operator
folding result
Recreates the step with all traversal arguments mapped with the provided function, if any.
Recreates the step with all traversal arguments mapped with the provided function, if any.
mapping function
step