Difference between revisions of "inside"

Revision as of 19:28, 5 January 2019

Type: inside :: Pattern Time -> (Pattern a -> Pattern b) -> Pattern a -> Pattern b

inside carries out an operation 'inside' a cycle.

For example, while rev "0 1 2 3 4 5 6 7" is the same as "7 6 5 4 3 2 1 0", inside 2 rev "0 1 2 3 4 5 6 7" gives "3 2 1 0 7 6 5 4".

What this function is really doing is 'slowing down' the pattern by a given factor, applying the given function to it, and then 'speeding it up' by the same factor. In other words, this:

inside 2 rev "0 1 2 3 4 5 6 7"

Is doing this:

fast 2 $ rev $ slow 2 "0 1 2 3 4 5 6 7"

.. so rather than whole cycles, each halves of a cycle is reversed.

@@ Line 1: / Line 1: @@
 [[Type signatures|Type]]: <source inline>inside :: Pattern Time -> (Pattern a -> Pattern b) -> Pattern a -> Pattern b</source>
-''inside'' carries out an operation 'inside' a cycle.
+'''inside''' carries out an operation 'inside' a cycle.
 For example, while <source inline>rev "0 1 2 3 4 5 6 7"</source> is the same as <source inline>"7 6 5 4 3 2 1 0"</source>, <source inline>inside 2 rev "0 1 2 3 4 5 6 7"</source> gives <source inline>"3 2 1 0 7 6 5 4"</source>.
+What this function is really doing is 'slowing down' the pattern by a given factor, applying the given function to it, and then 'speeding it up' by the same factor. In other words, this:
+<source>
+inside 2 rev "0 1 2 3 4 5 6 7"
+</source>
+Is doing this:
+<source>
+fast 2 $ rev $ slow 2 "0 1 2 3 4 5 6 7"
+</source>
+.. so rather than whole cycles, each halves of a cycle is reversed.
 [[Category:Functions]]