{"id":18,"date":"2007-07-26T22:47:35","date_gmt":"2007-07-27T05:47:35","guid":{"rendered":"http:\/\/www.elbeno.com\/haskell_soe_blog\/?p=18"},"modified":"2008-01-07T21:53:32","modified_gmt":"2008-01-08T05:53:32","slug":"exercise-54","status":"publish","type":"post","link":"https:\/\/www.elbeno.com\/haskell_soe_blog\/?p=18","title":{"rendered":"Exercise 5.4"},"content":{"rendered":"<p>Assume that <tt>f2 = map<\/tt>.<br \/>\nThen:<\/p>\n<pre lang=\"haskell\">f1 :: [a -> a] -> a -> [a]\r\nf1 fs x = map (\\f -> f x) fs<\/pre>\n<p>Or in one line:<\/p>\n<pre lang=\"haskell\">(\\fs x -> map (\\f -> f x) fs) (map (*) [1,2,3,4]) 5 => [5,10,15,20]<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Assume that f2 = map. Then: f1 :: [a -> a] -> a -> [a] f1 fs x = map (\\f -> f x) fs Or in one line: (\\fs x -> map (\\f -> f x) fs) (map (*) [1,2,3,4]) 5 => [5,10,15,20]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.elbeno.com\/haskell_soe_blog\/index.php?rest_route=\/wp\/v2\/posts\/18"}],"collection":[{"href":"https:\/\/www.elbeno.com\/haskell_soe_blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.elbeno.com\/haskell_soe_blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.elbeno.com\/haskell_soe_blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.elbeno.com\/haskell_soe_blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=18"}],"version-history":[{"count":0,"href":"https:\/\/www.elbeno.com\/haskell_soe_blog\/index.php?rest_route=\/wp\/v2\/posts\/18\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.elbeno.com\/haskell_soe_blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.elbeno.com\/haskell_soe_blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.elbeno.com\/haskell_soe_blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}