matrix-inverse - npm Package Compare versions

Comparing version 1.0.1 to 2.0.0

CHANGELOG.md

 # Changelog
 
+## 2.0.0
+
+- Given an uninvertible matrix, return null instead of throwing an exception.
+
 ## 1.0.1
@@ -4,0 +8,0 @@

matrix-inverse.js

 var Sylvester = {}
 
-Sylvester.Matrix = function() {}
+Sylvester.Matrix = function () {}
 
-Sylvester.Matrix.create = function(elements) {
+Sylvester.Matrix.create = function (elements) {
   var M = new Sylvester.Matrix()
@@ -10,3 +10,3 @@ return M.setElements(elements)
 
-Sylvester.Matrix.I = function(n) {
+Sylvester.Matrix.I = function (n) {
   var els = [],
@@ -26,7 +26,7 @@ i = n,
 Sylvester.Matrix.prototype = {
-  dup: function() {
+  dup: function () {
     return Sylvester.Matrix.create(this.elements)
   },
 
-  isSquare: function() {
+  isSquare: function () {
     var cols = this.elements.length === 0 ? 0 : this.elements[0].length
@@ -36,3 +36,3 @@ return this.elements.length === cols
 
-  toRightTriangular: function() {
+  toRightTriangular: function () {
     if (this.elements.length === 0) return Sylvester.Matrix.create([])
@@ -79,3 +79,3 @@ var M = this.dup(),
 
-  determinant: function() {
+  determinant: function () {
     if (this.elements.length === 0) {
@@ -96,7 +96,7 @@ return 1
 
-  isSingular: function() {
+  isSingular: function () {
     return this.isSquare() && this.determinant() === 0
   },
 
-  augment: function(matrix) {
+  augment: function (matrix) {
     if (this.elements.length === 0) {
@@ -126,3 +126,3 @@ return this.dup()
 
-  inverse: function() {
+  inverse: function () {
     if (this.elements.length === 0) {
@@ -175,3 +175,3 @@ return null
 
-  setElements: function(els) {
+  setElements: function (els) {
     var i,
@@ -201,4 +201,9 @@ j,
 
-module.exports = function(elements) {
-  return Sylvester.Matrix.create(elements).inverse().elements
+module.exports = function (elements) {
+  const mat = Sylvester.Matrix.create(elements).inverse()
+  if (mat !== null) {
+    return mat.elements
+  } else {
+    return null
+  }
 }

package.json

 {
   "name": "matrix-inverse",
-  "version": "1.0.1",
+  "version": "2.0.0",
   "description": "Matrix inverse (code from sylvester)",
@@ -10,3 +10,3 @@ "main": "matrix-inverse.js",
     "prettier:check": "prettier --check \"**/*.@(yml|json|js|md)\"",
-    "test": "npm run test && npm run prettier:check"
+    "test": "npm run test:js && npm run prettier:check"
   },
@@ -25,3 +25,3 @@ "keywords": [
     "chai-stats": "~0.3.0",
-    "prettier": "^1.18.2"
+    "prettier": "^2.0.5"
   },
@@ -28,0 +28,0 @@ "files": [

README.md

@@ -28,3 +28,6 @@ # matrix-inverse
 
-const M = [[3, 3.2], [3.5, 3.6]]
+const M = [
+  [3, 3.2],
+  [3.5, 3.6],
+]
 
@@ -31,0 +34,0 @@ const M_inv = matrixInverse(M)

No alert changes

Improved metrics

Total package byte prevSize

8666

increased by2.16%

Lines of code

189

increased by2.72%

Number of lines in readme file

59

increased by5.36%

No dependency changes