English: The sequence of applications that are produced by a call to foldl. Contrary to foldr, in this case the list elements are combined from left to right. In this particular example foldr would produce a different result, given that string concatenation is not a commutative operation.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.