44:["$","title",null,{"children":"Fantasy Name Generator | jorard | Observable"}] 4c:T5c6,probability = { const emptyProbabilities = alphabet .map(letter => { const dict = alphabet.reduce((dict, letter) => Object.assign(dict, { [letter]: 0 }), { }) return [letter, dict] }) .reduce((outerDict, [letter, innerDict]) => Object.assign(outerDict, { [letter]: innerDict }), { }) const probabilities = names.reduce((matrix, name) => { return name.split('').reduce((matrix, character, index, array) => { if (index === array.length - 1) { return matrix } const currentCharacter = character.toLowerCase() const nextCharacter = array[index + 1].toLowerCase() return Object.assign(matrix, { [currentCharacter]: Object.assign(matrix[currentCharacter] || { }, { [nextCharacter]: matrix[currentCharacter] ? (matrix[currentCharacter][nextCharacter] || 0) + 1 : 1 }) }) }, emptyProbabilities) }, { }) const rows = Object.keys(probabilities) return rows.reduce((prob, letter1) => { const columns = Object.keys(probabilities[letter1]) const total = columns.reduce((sum, letter2) => { return sum + probabilities[letter1][letter2] }, 0) return columns.reduce((prob, letter2) => { return Object.assign(prob, { [letter1]: Object.assign(prob[letter1], { [letter2]: total > 0 ? prob[letter1][letter2] / total : total }) }) }, prob) }, probabilities) }4d:T52c,generateName = (numberOfLetters = rng(3, 15)) => { const titlecase = s => s.slice(0, 1).toUpperCase() + s.slice(1) const pickLetter = (previous, needVowel) => { if (!previous) { const index = rng(0, availableLetters.length) return availableLetters[index] } const random = Math.random() const lastLetter = availableLetters[availableLetters.length - 1] const choose = (total = 0, [letter, ...rest] = availableLetters) => { const newTotal = total + probability[previous][letter] return random <= newTotal || letter === lastLetter ? letter : choose(newTotal, rest) } const letter = choose() return (needVowel && vowel(letter)) || (!needVowel && consonant(letter)) ? letter : pickLetter(previous, needVowel) } const generateName = (n = numberOfLetters, letters = []) => { if (n === 0) { return titlecase(letters.join('')) } const needVowel = numberOfLetters > 2 ? letters.length >= 2 && letters.slice(-2).every(consonant) : letters.length === 1 && consonant(letters[0]) const previous = letters[letters.length - 1] const nextLetter = pickLetter(previous, needVowel) return generateName(n - 1, [...letters, nextLetter]) } return generateName() }4e:T778,viewof demo = { const demo = html`

Fantasy Name Generator

` demo.querySelector('#name-generator').addEventListener('submit', event => { event.preventDefault() const name = document.querySelector('#name') const nameContainer = document.querySelector('#name-container') const length = parseInt(document.querySelector('#length').value) if (nameContainer.style.display != 'block') { nameContainer.style.display = 'block' } name.innerText = generateName(length || rng(3, 15)) }) return demo } 4f:[] 48:{"id":"780add790b618887","slug":"fantasy-name-generator","title":"Fantasy Name Generator","thumbnail":"eb9752275265ed5024737a58d07845139c86a1a476ed1bb66901a577fa7817fe","access_level":"public","create_time":"$D2018-07-28T18:19:45.877Z","update_time":"$D2019-02-02T17:04:28.031Z","view_time":null,"first_public_time":"$D2018-07-28T18:20:37.863Z","has_unpublished_edits":null,"fork":true,"stars":1,"starred":false,"owner":{"type":"team","id":"210340356221d658","login":"jorard","name":"","avatar_url":"https://avatars-next.observableusercontent.com/34a4f15178d5396f691fec9412e5e2a3e55644f6e7ddafbc674f9b85877ed5f6","tier":"starter_2024","bio":"","followed_by_you":false,"follows_you":false},"version":512,"publish_version":512,"role":null,"authored":false,"authors":[{"type":"individual","id":"4bdb5f2dab35846c","login":"jorard","name":"","avatar_url":"https://avatars-next.observableusercontent.com/34a4f15178d5396f691fec9412e5e2a3e55644f6e7ddafbc674f9b85877ed5f6","tier":null,"bio":"","followed_by_you":false,"follows_you":false}],"members":[{"type":"individual","id":"4bdb5f2dab35846c","login":"jorard","name":"","avatar_url":"https://avatars-next.observableusercontent.com/34a4f15178d5396f691fec9412e5e2a3e55644f6e7ddafbc674f9b85877ed5f6","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":2,"collection":null,"type":"notebook","body":{"titling":"auto","title":"Fantasy Name Generator","cells":[{"id":236,"value":"md`\n # Fantasy Name Generator\n\n My first poke at Machine Learning :)\n\n #### Training Data\n\n First off, define \\`names\\` to be a list of names to serve as training data for the name generator.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":16,"value":"names = {\n return fetch('https://raw.githubusercontent.com/dominictarr/random-name/master/first-names.json')\n .then(result => result.json())\n .then(names => {\n return names\n .map(name => name.replace('-', '').trim())\n .reduce((names, name) => [...names, ...name.split(' ')], [])\n })\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":259,"value":"md`\n#### Useful Constants\n\n- \\`alphabet\\`\n \n An array containing the Latin alphabet - to build our base probability data.\n\n- \\`vowels\\`\n\n An array containing the vowels in the Latin alphabet - so we can easily distinguish between vowels and consonants later on.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":33,"value":"alphabet = (function abc(charCode = 'a'.charCodeAt(0), alphabet = []) {\n return charCode > 'z'.charCodeAt(0)\n ? alphabet\n : abc(charCode + 1, [...alphabet, String.fromCharCode(charCode)])\n})()","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":144,"value":"vowels = ['a', 'e', 'y', 'u' ,'i', 'o']","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":261,"value":"md`\n\n#### Training\n\nUsing the training data (stored in \\`names\\`), determine probabilities of one letter following another.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":38,"value":"$4c","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":267,"value":"md`\n\n#### Available Letters\n\nDetermine the available letters, comprised of the Latin alphabet (stored in \\`alphabet\\`) and any non-Latin characters that pop-up in the training data.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":99,"value":"availableLetters = Object.keys(probability)\n .reduce((letters, letter) => {\n return [...letters, letter, ...Object.keys(probability[letter])]\n }, [])\n .filter((letter, index, array) => array.indexOf(letter) === index)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":270,"value":"md`\n#### Helper Functions\n\n* \\`vowel (letter: string) -> boolean\\`\n\n Determine whether given letter is a vowel.\n\n* \\`consonant(letter: string) -> boolean\\`\n\n Determine whether given letter is a consonant.\n\n* \\`rng (min: number, max: number) -> number\\`\n\n Return a random integer between \\`min\\` and \\`max\\`.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":136,"value":"vowel = letter => vowels.indexOf(letter.toLowerCase()) > -1","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":138,"value":"consonant = letter => [...alphabet.filter(l => vowels.indexOf(l) === -1), 'y'].indexOf(letter.toLowerCase()) > -1","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":311,"value":"rng = (min, max) => Math.floor(min + Math.random() * (max - min))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":272,"value":"md`\n#### Name Generation Function\n\nThe function it's all about!\n\n* \\`generateName (numberOfLetters: number) -> string\\`\n\n Generates a random name of the requested length.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":82,"value":"$4d","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":161,"value":"$4e","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W4f","stdlib":"1"}} 24:null