feat: add CLI random number generator supporting 6 distributions

src/types.ts

@@ -0,0 +1,55 @@
+export type Dist =
+  | "uniform"
+  | "normal"
+  | "binomial"
+  | "poisson"
+  | "exponential"
+  | "hypergeometric";
+
+export const DISTS: Dist[] = [
+  "uniform",
+  "normal",
+  "binomial",
+  "poisson",
+  "exponential",
+  "hypergeometric",
+];
+
+export interface Options {
+  dist: Dist;
+  count: number;
+  decimals: number;
+  // uniform
+  min: number;
+  max: number;
+  // normal
+  mean: number;
+  stddev: number;
+  // binomial
+  trials: number;
+  prob: number;
+  // poisson
+  lambda: number;
+  // hypergeometric
+  popSize: number;
+  successes: number;
+  draws: number;
+}
+
+export function defaultOptions(dist: Dist): Options {
+  return {
+    dist,
+    count: 1,
+    decimals: 0,
+    min: 0,
+    max: 100,
+    mean: 0,
+    stddev: 1,
+    trials: 10,
+    prob: 0.5,
+    lambda: 1,
+    popSize: 100,
+    successes: 50,
+    draws: 10,
+  };
+}