getNewPrompt function

src/getNewPrompt.mjs

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+import { db } from "./db.mjs"
+import { randomSkewNormal, randomSkewNormalTrimmed } from "./skewNormal.mjs"
+
+const maxCount = 30000000
+const minCount = 200000
+
+export default async function getNewPrompt() {
+    const badWords = await db('bad_words')
+        .select('word')
+
+    const prompts = await db('dictionary')
+        .select('*')
+        .where({
+            derivative: 0,
+            scientific: 0,
+        })
+        .andWhere('count', '<', maxCount)
+        .andWhere('count', '>', minCount)
+        .andWhere('word', 'not in', badWords)
+        .whereNotNull('pronunciation')
+        .orderBy('count')
+
+
+    const randomEntry = (array) => {
+        //const random = (randomSkewNormal(Math.random,0,2,0)/6)
+        const random = Math.random()
+        return array[
+            parseInt(
+                array.length * random
+            )
+        ]
+    }
+    db.destroy()
+    return randomEntry(prompts)
+}
+
+
+
+console.log(await getNewPrompt())
+
+

src/skewNormal.mjs

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+const randomNormals = (rng) => {
+    let u1 = 0, u2 = 0;
+    //Convert [0,1) to (0,1)
+    while (u1 === 0) u1 = rng();
+    while (u2 === 0) u2 = rng();
+    const R = Math.sqrt(-2.0 * Math.log(u1));
+    const Θ = 2.0 * Math.PI * u2;
+    return [R * Math.cos(Θ), R * Math.sin(Θ)];
+}
+
+export const randomSkewNormal = (rng, ξ, ω, α = 0) => {
+    const [u0, v] = randomNormals(rng);
+    if (α === 0) {
+        return ξ + ω * u0;
+    }
+    const 𝛿 = α / Math.sqrt(1 + α * α);
+    const u1 = 𝛿 * u0 + Math.sqrt(1 - 𝛿 * 𝛿) * v;
+    const z = u0 >= 0 ? u1 : -u1;
+    return ξ + ω * z;
+}
+
+export const randomSkewNormalTrimmed = ()=>{
+    let random = 1
+    do {
+        random = randomSkewNormal(Math.random,0,2,0)
+    } while (random<0 || random>0.999999)  
+    return random
+}
+