Applies the predicate f to each element of slice in order, and returns those elements that satisfy f.

Like Filter, but f also takes in the element's index.

Like FilterWithErr, but f also takes in the element's index.

Applies f to each element of slice in order, removes any None results, and returns the rest.

Like FilterMap, but f also takes in the element's index.

Like FilterMapWithErr, but f also takes in the element's index.

Applies f to each element of slice in order, removes any None results, and returns the rest.

Applies the predicate f to each element of slice in order, and returns those elements that satisfy f.

Apply f to each element of slice in order, returning the results.

Like Map, but f also takes in the element's index.

Like MapWithErr, but f also takes in the element's index.

Apply f to each element of slice in order, returning the results.

Returns a new slice with elements from s in reverse order.