Functional

func map(func_, c): Create a new list with the results of successively applying func_ to each element in c.

func foldl(func_, c, initializer := null): Uses func_ to reduce c to a single value. func_ must take two arguments and return a single value. If initializer is null, first applies func_(c[0], c[1]) using the return value a to apply func_(a, c[2]) and so on. If initializer is not null, first applies func_(a, c[0]) using the return value a' to apply func_(a', c[1]) and so on.