2b:null 2c:["$","title",null,{"children":"Greek numerals \n DRAFT | Toph Tucker | Observable"}] 31:[] 2f:{"id":"bc447f0d438cb10e","slug":"greek-numerals","title":"Greek numerals \n DRAFT\n ","thumbnail":"a05b8c83f6450d09b2bfd05554d2fb3f4cc31460cad5788c206ec4be3a96e73d","access_level":"public","create_time":"$D2019-06-25T02:00:16.302Z","update_time":"$D2019-08-26T17:26:25.746Z","view_time":null,"first_public_time":"$D2019-07-06T22:34:38.995Z","fork":false,"stars":0,"starred":false,"owner":{"type":"team","id":"97290e936c339d8e","login":"tophtucker","name":"Toph Tucker","avatar_url":"https://avatars-next.observableusercontent.com/3706c31a8f9c59bb716c022c04b9c073144cd1368b78ac85f49139be6c93c34e","tier":"pro_2024"},"version":195,"publish_version":195,"role":null,"authored":false,"authors":[{"type":"individual","id":"0bb2842b01e0c652","login":"tophtucker","name":"Toph Tucker","avatar_url":"https://avatars-next.observableusercontent.com/3706c31a8f9c59bb716c022c04b9c073144cd1368b78ac85f49139be6c93c34e","tier":null}],"members":[{"type":"individual","id":"0bb2842b01e0c652","login":"tophtucker","name":"Toph Tucker","avatar_url":"https://avatars-next.observableusercontent.com/3706c31a8f9c59bb716c022c04b9c073144cd1368b78ac85f49139be6c93c34e","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"subscribed":null,"forks":0,"collection":{"id":"d40cc4f153f404b4","slug":"how-we-do-math","title":"How We Do Math","owner":{"id":"97290e936c339d8e","login":"tophtucker","name":"Toph Tucker"}},"type":"notebook","body":{"title":"Greek numerals \n DRAFT\n ","cells":[{"id":0,"value":"md`# Greek numerals ${draft()}\n\nhttps://en.wikipedia.org/wiki/Greek_numerals\n\nEncoding is slightly trickier than decoding, because there is a subtle principle at work: the “true” representation of a number is the shortest one possible. (This is mitigated somewhat in Arabic numerals by the absence of glyphs exceeding the base, and the funny sorta perfect-closure property I’ve been trying to put my finger on, where… but still present in the case of the repeating-nines forms.)`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":37,"value":"viewof n = html``","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":10,"value":"html`${numToGreek(n)}`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":156,"value":"md`Here’s the first thousand:`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":44,"value":"viewof table = {\n const t = Array(1e3).fill(true)\n .map((_, i) => i + 1)\n .map(n => [n, numToGreek(n)])\n const node = html`

\n \n \n ${t.map(row => html`\n \n `)\n }\n \n

${row[0]}

${row[1]}

`\n node.value = t\n return node\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":161,"value":"md`They grow pretty slowly, but use a shitload of glyphs (I will chart that too, gimme a minute):`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":135,"value":"{\n await visibility()\n const sel = d3.select(DOM.svg(width, table.length / 2))\n .attr(\"class\", \"fractal-text-bar-chart\")\n const g = sel.selectAll(\"g\").data(table).enter().append(\"g\")\n .attr(\"transform\", (d, i) => `translate(0, ${i * 15 + 20})`)\n g.append(\"rect\").attr(\"width\", width).attr(\"height\", 10).attr(\"fill\", \"white\")\n g.append(\"text\").attr(\"y\", 10).text(d => d[1])\n g.transition().duration(1e4)\n .attr(\"transform\", (d, i) => `translate(0, ${i * 0.5 + 20})`)\n return sel.node()\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":165,"value":"md`---`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":8,"value":"numToGreek = n => {\n let m = n\n const digits = []\n while (m > 0) {\n let nextDigit = values.find(d => d[1] <= m)\n digits.push(nextDigit[0])\n m -= nextDigit[1]\n }\n return digits.join(\"\")\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":4,"value":"values = [\n [\"⍺\", 1],\n [\"β\", 2],\n [\"γ\", 3],\n [\"δ\", 4],\n [\"ε\", 5],\n [\"Ϛ\", 6],\n [\"ζ\", 7],\n [\"η\", 8],\n [\"θ\", 9],\n [\"ι\", 10],\n [\"κ\", 20],\n [\"λ\", 30],\n [\"μ\", 40],\n [\"ν\", 50],\n [\"ξ\", 60],\n [\"ο\", 70],\n [\"π\", 80],\n [\"ϙ\", 90],\n [\"ρ\", 100],\n [\"σ\", 200],\n [\"τ\", 300],\n [\"υ\", 400],\n [\"φ\", 500],\n [\"χ\", 600],\n [\"ψ\", 700],\n [\"ω\", 800],\n [\"ϡ\", 900],\n [\"͵⍺\", 1000],\n [\"͵β\", 2000],\n [\"͵γ\", 3000],\n [\"͵δ\", 4000],\n [\"͵ε\", 5000],\n [\"͵Ϛ\", 6000],\n [\"͵ζ\", 7000],\n [\"͵η\", 8000],\n [\"͵θ\", 9000],\n].sort((a, b) => b[1] - a[1])","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":74,"value":"d3 = require(\"d3\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":136,"value":"style = html``","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":191,"value":"import {draft} from \"@tophtucker/scrapbook\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"}],"files":"$W31","stdlib":"1","titling":"auto"}} 30:"$2f:body"