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961.........396.....................472.......225..739..............415............451......................................904.............`31:[] 2e:{"title":"Advent of Code 2023 - #3","cells":[{"id":0,"value":"# Advent of Code 2023 - #3\n\n\nhttps://adventofcode.com/2023/day/3 40’","pinned":false,"hidden":false,"mode":"md"},{"id":3,"value":"## Part 1","pinned":false,"hidden":false,"mode":"md"},{"id":26,"value":"{\n const numbers = [...input.matchAll(/\\d+/g)];\n let i = 0;\n return html`

${input\n    .replaceAll(\n      /\\d+/g,\n      () =>\n        `${numbers[i++][0]}`\n    )\n    .replaceAll(\".\", \".\")}\n

`;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":13,"value":"function touchesSymbol(number) {\n const { 0: str, index, input } = number;\n const l = str.length;\n const width = input.indexOf(\"\\n\");\n for (let dy = -1; dy <= 1; ++dy) {\n for (let dx = -1; dx <= l; ++dx) {\n const char = input[index + dx + (width + 1) * dy];\n if (char && char !== \".\" && char !== \"\\n\" && !char.match(/\\d/))\n return true;\n }\n }\n return false;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":60,"value":"answer1 = d3.sum(input.matchAll(/\\d+/g), (number) =>\n touchesSymbol(number) ? +number[0] : NaN\n)","pinned":true,"hidden":false,"mode":"ojs"},{"id":65,"value":"---\n## Part 2","pinned":false,"hidden":false,"mode":"md"},{"id":94,"value":"{\n const gears = [...input.matchAll(\"\\\\*\")];\n let i = 0;\n return html`

${input.replaceAll(\n    \"*\",\n    () =>\n      `*`\n  )}\n

`;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":86,"value":"function gears(number) {\n const { 0: str, index, input } = number;\n const l = str.length;\n const width = input.indexOf(\"\\n\");\n const gears = [];\n for (let dy = -1; dy <= 1; ++dy) {\n for (let dx = -1; dx <= l; ++dx) {\n const pos = index + dx + (width + 1) * dy;\n if (input[pos] === \"*\") gears.push(pos);\n }\n }\n return gears;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":89,"value":"gearCounts = d3.rollup(\n Array.from(input.matchAll(/\\d+/g), gears).flat(),\n (v) => v.length,\n (d) => d\n)","pinned":true,"hidden":false,"mode":"ojs"},{"id":114,"value":"answer2 = d3.sum(\n d3.rollup(\n Array.from(input.matchAll(/\\d+/g), (number) => [\n +number[0],\n gears(number)\n ]).flatMap(([v, pos]) => pos.map((d) => [d, v])),\n (v) => (v.length === 2 ? v[0][1] * v[1][1] : NaN),\n ([d]) => d\n ),\n ([, v]) => v\n)","pinned":true,"hidden":false,"mode":"ojs"},{"id":84,"value":"---","pinned":false,"hidden":false,"mode":"md"},{"id":6,"value":"$30","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}