{"action":"created","issue":{"url":"https://api.github.com/repos/exercism/xscheme/issues/34","labels_url":"https://api.github.com/repos/exercism/xscheme/issues/34/labels{/name}","comments_url":"https://api.github.com/repos/exercism/xscheme/issues/34/comments","events_url":"https://api.github.com/repos/exercism/xscheme/issues/34/events","html_url":"https://github.com/exercism/xscheme/issues/34","id":79320285,"number":34,"title":"Hello World exercise not trivial in scheme","user":{"login":"PurityControl","id":7509180,"avatar_url":"https://avatars.githubusercontent.com/u/7509180?v=3","gravatar_id":"","url":"https://api.github.com/users/PurityControl","html_url":"https://github.com/PurityControl","followers_url":"https://api.github.com/users/PurityControl/followers","following_url":"https://api.github.com/users/PurityControl/following{/other_user}","gists_url":"https://api.github.com/users/PurityControl/gists{/gist_id}","starred_url":"https://api.github.com/users/PurityControl/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/PurityControl/subscriptions","organizations_url":"https://api.github.com/users/PurityControl/orgs","repos_url":"https://api.github.com/users/PurityControl/repos","events_url":"https://api.github.com/users/PurityControl/events{/privacy}","received_events_url":"https://api.github.com/users/PurityControl/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-05-22T06:46:26Z","updated_at":"2015-05-25T16:11:52Z","closed_at":null,"body":"Given the purpose of the hello world exercise, the solution in scheme maybe harder than we would like.\r\n\r\nThe r5rs specification gives a portable implementation for optional arguments. However use of this, as I understand it, requires knowledge of setting up functions with the more formal definition of a function using lambda and making the arguments to lambda a symbol rather than a list.\r\n\r\nThat is the traditional\r\n```\r\n(define (foo x)\r\n  .......)\r\n```\r\nwill no longer work and requires\r\n```\r\n(define foo\r\n  (lambda x ...........)\r\n```\r\nthis is non intuitive as the lambda form is normally\r\n```\r\n(define foo\r\n  (lambda (x) .........)\r\n```\r\n\r\nGuile offers a non portable `define*` which is slightly less confusing but requires users to be familiar with guile's library.\r\n\r\nI think it may be worth adding further information to the README with a small explanation and links\r\nto further reference such as\r\n\r\nhttps://www.gnu.org/software/guile/manual/html_node/Optional-Arguments.html\r\n\r\nhttps://www.gnu.org/software/guile/manual/html_node/Lambda.html#Lambda\r\n\r\nhttps://www.gnu.org/software/guile/manual/html_node/lambda_002a-and-define_002a.html#lambda_002a-and-define_002a"},"comment":{"url":"https://api.github.com/repos/exercism/xscheme/issues/comments/105258666","html_url":"https://github.com/exercism/xscheme/issues/34#issuecomment-105258666","issue_url":"https://api.github.com/repos/exercism/xscheme/issues/34","id":105258666,"user":{"login":"kytrinyx","id":276834,"avatar_url":"https://avatars.githubusercontent.com/u/276834?v=3","gravatar_id":"","url":"https://api.github.com/users/kytrinyx","html_url":"https://github.com/kytrinyx","followers_url":"https://api.github.com/users/kytrinyx/followers","following_url":"https://api.github.com/users/kytrinyx/following{/other_user}","gists_url":"https://api.github.com/users/kytrinyx/gists{/gist_id}","starred_url":"https://api.github.com/users/kytrinyx/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kytrinyx/subscriptions","organizations_url":"https://api.github.com/users/kytrinyx/orgs","repos_url":"https://api.github.com/users/kytrinyx/repos","events_url":"https://api.github.com/users/kytrinyx/events{/privacy}","received_events_url":"https://api.github.com/users/kytrinyx/received_events","type":"User","site_admin":false},"created_at":"2015-05-25T16:11:52Z","updated_at":"2015-05-25T16:11:52Z","body":"> \"Hello world should bethe easiest thing in the world, but you picked Scheme, so the joke's on you!\"\r\n\r\nThat totally made me smirk, but yah, maybe not :)"}}