30:T406,Plot.plot({ marks: [ Plot.lineY(schoolOverYear.filter( (val, idx) => idx < daysToDraw).map( day => day[0]), {stroke: "red"}), Plot.lineY(schoolOverYear.filter( (val, idx) => idx < daysToDraw).map( day => day[1]), {stroke: "green"}), Plot.lineY(schoolOverYear.filter( (val, idx) => idx < daysToDraw).map( day => day[2]), {stroke: "blue"}), Plot.lineY(schoolOverYear.filter( (val, idx) => idx < daysToDraw).map( day => day[3]), {stroke: "lightblue"}), Plot.lineY(schoolOverYear.filter( (val, idx) => idx < daysToDraw).map( day => day[4]), {stroke: "yellow"}), Plot.lineY(schoolOverYear.filter( (val, idx) => idx < daysToDraw).map( day => day[5]), {stroke: "magenta"}), Plot.lineY(schoolOverYear.filter( (val, idx) => idx < daysToDraw).map( day => day[6]), {stroke: "pink"}), Plot.lineY(schoolOverYear.filter( (val, idx) => idx < daysToDraw).map( day => day[7]), {stroke: "brown"}), Plot.lineY(schoolOverYear.filter( (val, idx) => idx < daysToDraw).map( day => day[8]), {stroke: "black"}) ] })31:[{"id":"76894d0fb155656018d5aa91050bdfdff326783042ae702b0fb4cc48944107d332e43dec131187ae47d1147afacf38cc8ff43ba6ee2762116cfb3506e76f8cfe","href":"https://static.observableusercontent.com/files/76894d0fb155656018d5aa91050bdfdff326783042ae702b0fb4cc48944107d332e43dec131187ae47d1147afacf38cc8ff43ba6ee2762116cfb3506e76f8cfe","name":"06_input.txt","type":"text/plain","lastModified":1638823724438.09,"size":600}] 2e:{"title":"Day 6: Lanternfish","cells":[{"id":0,"value":"# Day 6: Lanternfish ","pinned":false,"hidden":false,"mode":"md"},{"id":59,"value":"schoolOverYear = {\n let start = inputCount.slice()\n let res = Array(256)\n for (let index = 0; index < 256; ++index) {\n res[index] = smartPredictDay(start)\n start = res[index].slice()\n }\n return res\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":68,"value":"viewof daysToDraw = Inputs.range([1, 256], {label: \"Days to draw\", step: 1})","pinned":true,"hidden":false,"mode":"ojs"},{"id":62,"value":"$30","pinned":true,"hidden":false,"mode":"ojs"},{"id":3,"value":"## Part 1","pinned":false,"hidden":false,"mode":"md"},{"id":24,"value":"{\n let data = input\n for (let i = 0; i < 80; i++)\n data = predictDay(data)\n return data\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":22,"value":"function predictDay(school) {\n let spawnNbr = 0\n school = school.map( fish => {\n if (fish > 0)\n return fish - 1\n else {\n spawnNbr++\n return 6\n }\n })\n let newSpawns = Array(spawnNbr).fill(8)\n school.push(...newSpawns)\n return school\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":7,"value":"## Part 2","pinned":false,"hidden":false,"mode":"md"},{"id":44,"value":"schoolAfterOneYear = {\n let data = inputCount.slice()\n for (let i = 0; i < 256; i++)\n data = smartPredictDay(data)\n return data\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":54,"value":"schoolAfterOneYear.reduce((accumulator, currentValue, index, array) => {\n return accumulator + currentValue\n})","pinned":true,"hidden":false,"mode":"ojs"},{"id":35,"value":"function smartPredictDay( school ) {\n // Deal with large inputs by counting the number of fish for each \"age\"\n let spawners = school.shift()\n school.push(spawners)\n school[6] += spawners\n return school\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":10,"value":"# Input","pinned":false,"hidden":false,"mode":"md"},{"id":38,"value":"inputCount = input.reduce((accumulator, currentValue) => { \n accumulator[currentValue]++\n return accumulator\n}, Array(9).fill(0))","pinned":true,"hidden":false,"mode":"ojs"},{"id":15,"value":"input = FileAttachment(\"06_input.txt\").text().then( txt => txt.trim().split(\",\").map(parseFloat))","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}