@thi.ng/random - npm Package Compare versions

Comparing version 1.0.2 to 1.1.0

api.d.ts

 import { ICopy } from "@thi.ng/api";
 export interface IRandom {
     int(): number;
-    float(): number;
+    float(norm?: number): number;
     norm(scale?: number): number;
@@ -6,0 +6,0 @@ minmax(min: number, max: number): number;

CHANGELOG.md

@@ -6,2 +6,18 @@ # Change Log
 
+# [1.1.0](https://github.com/thi-ng/umbrella/compare/@thi.ng/random@[e-mail]/random@1.1.0) (2019-02-15)
+
+
+### Bug Fixes
+
+* **random:** add opt scale arg to IRandom.float() ([5a7e448](https://github.com/thi-ng/umbrella/commit/5a7e448))
+
+
+### Features
+
+* **random:** add randomID() & weightedRandom() ([f719724](https://github.com/thi-ng/umbrella/commit/f719724))
+
+
+
+
+
 ## [1.0.2](https://github.com/thi-ng/umbrella/compare/@thi.ng/random@[e-mail]/random@1.0.2) (2019-02-05)
@@ -8,0 +24,0 @@

index.d.ts

@@ -7,1 +7,3 @@ export * from "./api";
 export * from "./xsadd";
+export * from "./random-id";
+export * from "./weighted-random";

index.js

@@ -7,1 +7,3 @@ export * from "./api";
 export * from "./xsadd";
+export * from "./random-id";
+export * from "./weighted-random";

lib/index.js

@@ -162,2 +162,30 @@ 'use strict';
 
+const randomID = (len = 4, prefix = "", syms = "abcdefghijklmnopqrstuvwxyz", rnd = SYSTEM) => {
+    for (const n = syms.length; --len >= 0;) {
+        prefix += syms[rnd.float(n) | 0];
+    }
+    return prefix;
+};
+
+const weightedRandom = (choices, weights, rnd = SYSTEM) => {
+    const opts = choices.map(weights ?
+        (x, i) => [x, weights[i]] :
+        (x) => [x, 1]).sort((a, b) => b[1] - a[1]);
+    const n = choices.length;
+    let total = 0, i, r, sum;
+    for (i = 0; i < n; i++) {
+        total += opts[i][1];
+    }
+    return () => {
+        r = rnd.float(total);
+        sum = total;
+        for (i = 0; i < n; i++) {
+            sum -= opts[i][1];
+            if (sum <= r) {
+                return opts[i][0];
+            }
+        }
+    };
+};
+
 exports.ARandom = ARandom;
@@ -170,1 +198,3 @@ exports.Smush32 = Smush32;
 exports.XsAdd = XsAdd;
+exports.randomID = randomID;
+exports.weightedRandom = weightedRandom;

lib/index.umd.js

@@ -164,2 +164,30 @@ (function (global, factory) {
 
+    const randomID = (len = 4, prefix = "", syms = "abcdefghijklmnopqrstuvwxyz", rnd = SYSTEM) => {
+        for (const n = syms.length; --len >= 0;) {
+            prefix += syms[rnd.float(n) | 0];
+        }
+        return prefix;
+    };
+
+    const weightedRandom = (choices, weights, rnd = SYSTEM) => {
+        const opts = choices.map(weights ?
+            (x, i) => [x, weights[i]] :
+            (x) => [x, 1]).sort((a, b) => b[1] - a[1]);
+        const n = choices.length;
+        let total = 0, i, r, sum;
+        for (i = 0; i < n; i++) {
+            total += opts[i][1];
+        }
+        return () => {
+            r = rnd.float(total);
+            sum = total;
+            for (i = 0; i < n; i++) {
+                sum -= opts[i][1];
+                if (sum <= r) {
+                    return opts[i][0];
+                }
+            }
+        };
+    };
+
     exports.ARandom = ARandom;
@@ -172,2 +200,4 @@ exports.Smush32 = Smush32;
     exports.XsAdd = XsAdd;
+    exports.randomID = randomID;
+    exports.weightedRandom = weightedRandom;
 
@@ -174,0 +204,0 @@ Object.defineProperty(exports, '__esModule', { value: true });

package.json

 {
     "name": "@thi.ng/random",
-    "version": "1.0.2",
+    "version": "1.1.0",
     "description": "Pseudo-random number generators w/ unified API",
@@ -48,3 +48,3 @@ "module": "./index.js",
     "sideEffects": false,
-    "gitHead": "74fb4d83013785ce7a95357c565426a046657e74"
+    "gitHead": "418f7af20c8ce3098e86bbc3a2377ccbac761b70"
 }

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Improved metrics

Total package byte prevSize

52135

increased by16.66%

Number of package files

26

increased by18.18%

Lines of code

730

increased by25.86%

No dependency changes