@aryth/rand - npm Package Compare versions

Comparing version 0.3.17 to 0.3.18

dist/index.cjs.js

@@ -7,2 +7,3 @@ 'use strict';
 var comparer = require('@aryth/comparer');
+var nullish = require('@typen/nullish');
 
@@ -138,9 +139,3 @@ const {
   constructor(mean = 0, stdev = 1) {
-    this.jsr = 123456789;
-    this.wn = Array(128);
-    this.fn = Array(128);
-    this.kn = Array(128);
-    this.mean = mean;
-    this.stdev = stdev;
-    this.preset();
+    this.bootstrap(mean, stdev);
   }
@@ -152,3 +147,9 @@
 
-  preset() {
+  bootstrap(mean, stdev) {
+    this.mean = mean;
+    this.stdev = stdev;
+    this.jsr = 123456789;
+    this.wn = Array(128);
+    this.fn = Array(128);
+    this.kn = Array(128);
     this.jsr ^= new Date().getTime(); // seed generator based on current time
@@ -236,2 +237,48 @@
 
+/**
+ *
+ * applicable for smaller number
+ * @param {number} x
+ * @returns {number}
+ */
+
+
+const round = x => x + (x > 0 ? 0.5 : -0.5) << 0;
+
+const E2 = 1E+2;
+
+const roundD1 = x => Math.round(x * 10) / 10;
+
+const roundD2 = x => Math.round(x * E2) / E2;
+
+/**
+ *
+ * @param {number} mean
+ * @param {number} stdev
+ * @param {number} [digits]
+ * @yields {number} next random norm dist. number simulated by the ziggurat algorithm.
+ */
+
+function* zigguratGenerator(mean, stdev, digits) {
+  this.bootstrap(mean, stdev);
+
+  if (nullish.nullish(digits)) {
+    while (true) yield this.randSample() * this.stdev + this.mean;
+  } else {
+    if (digits > 2) this.D = 10 ^ digits;
+    const rounder = digits === 0 ? round : digits === 1 ? roundD1 : digits === 2 ? roundD2 : x => Math.round(x * this.D) / this.D;
+
+    while (true) yield rounder(this.randSample() * this.stdev + this.mean);
+  }
+}
+/**
+ *
+ * @param {number} mean
+ * @param {number} stdev
+ * @param {number} [digits]
+ * @returns {Generator<*, void, *>}
+ */
+
+const ziggurat = (mean, stdev, digits) => zigguratGenerator.call(Ziggurat.prototype, mean, stdev, digits);
+
 exports.Ziggurat = Ziggurat;
@@ -252,1 +299,2 @@ exports.flop = flop;
 exports.shuffle = shuffle;
+exports.ziggurat = ziggurat;

dist/index.esm.js

 import { swap } from '@vect/swap';
 import { max } from '@aryth/comparer';
+import { nullish } from '@typen/nullish';
 
@@ -133,9 +134,3 @@ const {
   constructor(mean = 0, stdev = 1) {
-    this.jsr = 123456789;
-    this.wn = Array(128);
-    this.fn = Array(128);
-    this.kn = Array(128);
-    this.mean = mean;
-    this.stdev = stdev;
-    this.preset();
+    this.bootstrap(mean, stdev);
   }
@@ -147,3 +142,9 @@
 
-  preset() {
+  bootstrap(mean, stdev) {
+    this.mean = mean;
+    this.stdev = stdev;
+    this.jsr = 123456789;
+    this.wn = Array(128);
+    this.fn = Array(128);
+    this.kn = Array(128);
     this.jsr ^= new Date().getTime(); // seed generator based on current time
@@ -231,2 +232,48 @@
 
-export { Ziggurat, flop, flopEntry, flopGenerator, flopIndex, flopKey, flopValue, rand, randBetw, randIn, randInt, randIntBetw, randLong, randLongStr, shuffle };
+/**
+ *
+ * applicable for smaller number
+ * @param {number} x
+ * @returns {number}
+ */
+
+
+const round = x => x + (x > 0 ? 0.5 : -0.5) << 0;
+
+const E2 = 1E+2;
+
+const roundD1 = x => Math.round(x * 10) / 10;
+
+const roundD2 = x => Math.round(x * E2) / E2;
+
+/**
+ *
+ * @param {number} mean
+ * @param {number} stdev
+ * @param {number} [digits]
+ * @yields {number} next random norm dist. number simulated by the ziggurat algorithm.
+ */
+
+function* zigguratGenerator(mean, stdev, digits) {
+  this.bootstrap(mean, stdev);
+
+  if (nullish(digits)) {
+    while (true) yield this.randSample() * this.stdev + this.mean;
+  } else {
+    if (digits > 2) this.D = 10 ^ digits;
+    const rounder = digits === 0 ? round : digits === 1 ? roundD1 : digits === 2 ? roundD2 : x => Math.round(x * this.D) / this.D;
+
+    while (true) yield rounder(this.randSample() * this.stdev + this.mean);
+  }
+}
+/**
+ *
+ * @param {number} mean
+ * @param {number} stdev
+ * @param {number} [digits]
+ * @returns {Generator<*, void, *>}
+ */
+
+const ziggurat = (mean, stdev, digits) => zigguratGenerator.call(Ziggurat.prototype, mean, stdev, digits);
+
+export { Ziggurat, flop, flopEntry, flopGenerator, flopIndex, flopKey, flopValue, rand, randBetw, randIn, randInt, randIntBetw, randLong, randLongStr, shuffle, ziggurat };

package.json

 {
   "name": "@aryth/rand",
-  "version": "0.3.17",
+  "version": "0.3.18",
   "description": "A math util library",
@@ -18,3 +18,4 @@ "main": "dist/index.cjs.js",
   "dependencies": {
-    "@aryth/comparer": "^0.3.17",
+    "@aryth/comparer": "^0.3.18",
+    "@typen/nullish": "^0.1.16",
     "@vect/swap": "^0.3.9"
@@ -37,3 +38,3 @@ },
   "homepage": "https://github.com/hoyeungw/aryth#readme",
-  "gitHead": "18a29f8be001a550c00759e92a823699483c106c"
+  "gitHead": "4c78f9496801184a8ed6bf8fa3fd1b06d3b81cf8"
 }

New alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Fixed alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

16678

increased by17%

Lines of code

461

increased by18.81%

Worsened metrics

Dependency count

3

increased by50%

Dependency changes

• + Added@typen/nullish@^0.1.16

• + Added@typen/nullish@0.1.19(transitive)

• Updated@aryth/comparer@^0.3.18