{"id":829,"date":"2009-10-24T21:54:31","date_gmt":"2009-10-25T06:54:31","guid":{"rendered":"https:\/\/www.kellyrob99.com\/blog\/?p=829"},"modified":"2009-10-25T11:26:48","modified_gmt":"2009-10-25T20:26:48","slug":"groovy-reverse-map-sort-done-easy","status":"publish","type":"post","link":"https:\/\/www.kellyrob99.com\/blog\/2009\/10\/24\/groovy-reverse-map-sort-done-easy\/","title":{"rendered":"Groovy reverse map sort done easy"},"content":{"rendered":"

Sorting a Map by value with Groovy is very simple, due to the added ‘sort’ method on the Map interface.<\/p>\n

\r\ndef map = [a:3, b:2, c:1]\r\nmap = map.sort {it.value}\r\nassert map == [c:1, b:2, a:3]\r\n<\/pre>\n
Turns out doing a reverse sort on a Map by values is almost as easy.<\/p>\n
\r\ndef map = [a:1, b:2, c:3]\r\nmap = map.sort {a, b -> b.value <=> a.value}\r\nassert map == [c:3, b:2, a:1]\r\n<\/pre>\n
Using the spaceship operator (‘< =>‘) you can define a very terse syntax for accessing ‘compareTo’, as long as the values in the map implement Comparable that is.
\nNice!<\/p>\n","protected":false},"excerpt":{"rendered":"
Sorting a Map by value with Groovy is very simple, due to the added ‘sort’ method on the Map interface. def map = [a:3, b:2, c:1] map = map.sort {it.value} assert map == [c:1, b:2, a:3] Turns out doing a reverse sort on a Map by values is almost as easy. def map = [a:1, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[6],"tags":[257,136,137,113],"class_list":["post-829","post","type-post","status-publish","format-standard","hentry","category-dev","tag-groovy","tag-map","tag-sort","tag-thekaptain"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/prjtg-dn","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.kellyrob99.com\/blog\/wp-json\/wp\/v2\/posts\/829","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kellyrob99.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kellyrob99.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kellyrob99.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kellyrob99.com\/blog\/wp-json\/wp\/v2\/comments?post=829"}],"version-history":[{"count":6,"href":"https:\/\/www.kellyrob99.com\/blog\/wp-json\/wp\/v2\/posts\/829\/revisions"}],"predecessor-version":[{"id":834,"href":"https:\/\/www.kellyrob99.com\/blog\/wp-json\/wp\/v2\/posts\/829\/revisions\/834"}],"wp:attachment":[{"href":"https:\/\/www.kellyrob99.com\/blog\/wp-json\/wp\/v2\/media?parent=829"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kellyrob99.com\/blog\/wp-json\/wp\/v2\/categories?post=829"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kellyrob99.com\/blog\/wp-json\/wp\/v2\/tags?post=829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}