2b:null 2c:["$","title",null,{"children":"Staying out of the loop with recursion | Samad Ariyan | Observable"}] 31:[] 2f:{"id":"aed6927689eefd2b","slug":null,"title":"Staying out of the loop with recursion","thumbnail":"6146fe214f8e60f7cc50660a7843595f12c8fccc1ccea0aaaea5414fe59e5440","access_level":"public","create_time":"$D2024-03-11T07:05:45.985Z","update_time":"$D2024-03-11T07:05:45.985Z","view_time":null,"first_public_time":"$D2024-03-11T07:05:45.985Z","has_unpublished_edits":null,"fork":{"id":"cc72eed9810fcc73","slug":"staying-out-of-the-loop-with-recursion","title":"Staying out of the loop with recursion","owner":{"id":"8cc6a24956698638","login":"anjana","name":"Anjana Vakil"}},"stars":0,"starred":false,"owner":{"type":"team","id":"8e9aa3f4ea32ae26","login":"samad","name":"Samad Ariyan","avatar_url":"https://avatars-next.observableusercontent.com/d2f03f45d3af931a0b34f3871b71cc0f85b5a571abcee54f6b5af875485623de","tier":"starter_2024"},"version":55,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"03d4540ceb70311c","login":"samad-ariyan","name":"Samad Ariyan","avatar_url":"https://avatars-next.observableusercontent.com/6ed0d1b2695210e6f214155b3cecb141967526a5a617cfc88131bf9123488394","tier":null}],"members":[{"type":"team","id":"8e9aa3f4ea32ae26","login":"samad","name":"Samad Ariyan","avatar_url":"https://avatars-next.observableusercontent.com/d2f03f45d3af931a0b34f3871b71cc0f85b5a571abcee54f6b5af875485623de","tier":"starter_2024","role":"editor"},{"type":"individual","id":"03d4540ceb70311c","login":"samad-ariyan","name":"Samad Ariyan","avatar_url":"https://avatars-next.observableusercontent.com/6ed0d1b2695210e6f214155b3cecb141967526a5a617cfc88131bf9123488394","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":{"id":"fb36a43ce5577d5a","slug":"functional-javascript-first-steps","title":"Functional JavaScript First Steps","owner":{"id":"8e9aa3f4ea32ae26","login":"samad","name":"Samad Ariyan"}},"type":"notebook","body":{"title":"Staying out of the loop with recursion","cells":[{"id":0,"value":"slide.md`# Staying out of the loop with recursion`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":35,"value":"slide.html`

Iteration

imperative

looping

stateful

Recursion

functional

self-referential

stateless

\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":30,"value":"slide.md`# Iteration isn't functional\n\n## use recursion instead\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":40,"value":"slide.md`# Iteration:\n\n\\`\\`\\`js\nfunction sum (numbers) {\n let total = 0;\n for (i = 0; i < numbers.length; i++) {\n total += numbers[i];\n }\n return total;\n}\n\nsum([0,1,2,3,4]); // 10\n\\`\\`\\`\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":43,"value":"slide.md`# Recursion:\n\n\\`\\`\\`js\nfunction sum (numbers) {\n if (numbers.length === 1) {\n // base case\n return numbers[0];\n } else {\n // recursive case\n return numbers[0] + sum(numbers.slice(1));\n }\n}\n\nsum([0,1,2,3,4]); // 10\n\\`\\`\\`\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":50,"value":"slide.md`# OK, let's do it! \n\n### [=> Exercise: Iteration vs. Recursion](https://observablehq.com/d/89173eb291a624f6?collection=@anjana/functional-javascript-first-steps)\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":46,"value":"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":5,"value":"md`-----\n\n#### Appendix: Slideshow helpers`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":9,"value":"import { slide, notes, style, keyBindings } from '@visnup/slides'","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":11,"value":"import { customStyle } from '5b88a355d27605eb'","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":25,"value":"customStyle","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":15,"value":"keyBindings","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W31","stdlib":"1","titling":"auto"}} 30:"$2f:body"