Javascript/linear-algebra-javascript

itsvinayak · itsvinayak · commit c3532cad6f1d · 2020-05-06T01:42:25.000+05:30
diff --git a/linear-algebra-javascript/src/la_lib.js b/linear-algebra-javascript/src/la_lib.js
@@ -14,17 +14,19 @@ var LinearAlgebra;
   var Vector = /** @class */ (function () {
     // constructor
     function Vector (N, comps) {
-      if (comps === void 0) { comps = [] }
+      if (comps === undefined) {
+        comps = []
+      }
       this.components = new Array(N)
-      if (comps.length == 0) {
+      if (comps.length === 0) {
         for (var i = 0; i < N; i++) {
           this.components[i] = 0.0
         }
       } else {
-        if (N == comps.length) {
+        if (N === comps.length) {
           this.components = comps
         } else {
-          throw 'Vector: invalide size!'
+          throw new Error('Vector: invalide size!')
         }
       }
     } // end of constructor
@@ -51,46 +53,46 @@ var LinearAlgebra;
       if (index >= 0 && index < this.components.length) {
         this.components[index] = value
       } else {
-        throw 'changeComponent: index out of bounds!'
+        throw new Error('changeComponent: index out of bounds!')
       }
     }
     // vector addition
     Vector.prototype.add = function (other) {
-      if (this.size() == other.size()) {
+      if (this.size() === other.size()) {
         var SIZE = this.size()
         var ans = new Vector(SIZE)
         for (var i = 0; i < SIZE; i++) {
           ans.changeComponent(i, (this.components[i] + other.component(i)))
         }
         return ans
       } else {
-        throw 'add: vector must have same size!'
+        throw new Error('add: vector must have same size!')
       }
     }
     // vector subtraction
     Vector.prototype.sub = function (other) {
-      if (this.size() == other.size()) {
+      if (this.size() === other.size()) {
         var SIZE = this.size()
         var ans = new Vector(SIZE)
         for (var i = 0; i < SIZE; i++) {
           ans.changeComponent(i, (this.components[i] - other.component(i)))
         }
         return ans
       } else {
-        throw 'add: vector must have same size!'
+        throw new Error('add: vector must have same size!')
       }
     }
     // dot-product
     Vector.prototype.dot = function (other) {
       var sum = 0
-      if (other.size() == this.size()) {
+      if (other.size() === this.size()) {
         var SIZE = other.size()
         for (var i = 0; i < SIZE; i++) {
           sum += this.components[i] * other.component(i)
         }
         return sum
       } else {
-        throw 'dot: vectors must have same size!'
+        throw new Error('dot: vectors must have same size!')
       }
     }
     // scalar multiplication
@@ -120,14 +122,14 @@ var LinearAlgebra;
     Vector.prototype.createUnitBasis = function (pos) {
       if (pos >= 0 && pos < this.components.length) {
         for (var i = 0; i < this.components.length; i++) {
-          if (i == pos) {
+          if (i === pos) {
             this.components[i] = 1.0
           } else {
             this.components[i] = 0.0
           }
         }
       } else {
-        throw 'createUnitBasis: index out of bounds'
+        throw new Error('createUnitBasis: index out of bounds')
       }
       return this
     }
@@ -145,7 +147,7 @@ var LinearAlgebra;
       var ans = true
       var SIZE = this.size()
       var EPSILON = 0.001
-      if (SIZE == other.size()) {
+      if (SIZE === other.size()) {
         for (var i = 0; i < SIZE; i++) {
           if (Math.abs(this.components[i] - other.component(i)) > EPSILON) {
             ans = false
@@ -164,7 +166,7 @@ var LinearAlgebra;
   function unitBasisVector (N, pos) {
     var ans = new Vector(N)
     for (var i = 0; i < N; i++) {
-      if (i == pos) {
+      if (i === pos) {
         ans.changeComponent(i, 1.0)
       } else {
         ans.changeComponent(i, 0)
@@ -199,16 +201,18 @@ var LinearAlgebra;
   var Matrix = /** @class */ (function () {
     // constructor for zero-matrix or fix number matrix.
     function Matrix (row, col, comps) {
-      if (comps === void 0) { comps = [] }
-      if (comps.length == 0) {
-        this.matrix = new Array()
-        var rowVector = new Array()
+      if (comps === undefined) {
+        comps = []
+      }
+      if (comps.length === 0) {
+        this.matrix = []
+        var rowVector = []
         for (var i = 0; i < row; i++) {
           for (var j = 0; j < col; j++) {
             rowVector[j] = 0
           }
           this.matrix[i] = rowVector
-          rowVector = new Array()
+          rowVector = []
         }
       } else {
         this.matrix = comps
@@ -253,15 +257,15 @@ var LinearAlgebra;
     }
     // returns the dimension rows x cols as number array
     Matrix.prototype.dimension = function () {
-      var ans = new Array()
+      var ans = []
       ans[0] = this.rows
       ans[1] = this.cols
       return ans
     }
     // matrix addition. returns the result.
     Matrix.prototype.add = function (other) {
-      if (this.rows == other.dimension()[0] &&
-                this.cols == other.dimension()[1]) {
+      if (this.rows === other.dimension()[0] &&
+        this.cols === other.dimension()[1]) {
         var ans = new Matrix(this.rows, this.cols)
         for (var i = 0; i < this.rows; i++) {
           for (var j = 0; j < this.cols; j++) {
@@ -277,8 +281,8 @@ var LinearAlgebra;
     Matrix.prototype.equal = function (other) {
       var ans = true
       var EPSILON = 0.001
-      if (this.rows == other.dimension()[0] &&
-                this.cols == other.dimension()[1]) {
+      if (this.rows === other.dimension()[0] &&
+        this.cols === other.dimension()[1]) {
         for (var i = 0; i < this.rows; i++) {
           for (var j = 0; j < this.cols; j++) {
             if (Math.abs(this.matrix[i][j] - other.component(i, j)) > EPSILON) {
diff --git a/linear-algebra-javascript/test/test.js b/linear-algebra-javascript/test/test.js
@@ -5,25 +5,25 @@
     This file contains the test-suite for the linear algebra library.
     The tests use javascript test-framework mocha
 */
+/* eslint-disable */
 
 var assert = require('assert')
 var fs = require('fs')
 
 // file is included here
 eval(fs.readFileSync('src/la_lib.js') + '')
-
 // Tests goes here
 
 // creating some vectors
 describe('Create Vectors', function () {
   describe('#toString()', function () {
     it('should return a string representation', function () {
-      assert.equal((new LinearAlgebra.Vector(3, [1, 2, 3])).toString(), '(1,2,3)')
+      assert.strictEqual((new LinearAlgebra.Vector(3, [1, 2, 3])).toString(), '(1,2,3)')
     })
   })
   describe('#unitBasisVector()', function () {
     it('should return a unit basis vector', function () {
-      assert.equal(LinearAlgebra.unitBasisVector(3, 1).toString(), '(0,1,0)')
+      assert.strictEqual(LinearAlgebra.unitBasisVector(3, 1).toString(), '(0,1,0)')
     })
   })
 })
@@ -34,27 +34,27 @@ describe('Vector operations', function () {
     it('should return vector (2,4,6)', function () {
       var x = new LinearAlgebra.Vector(3, [1, 2, 3])
       var y = new LinearAlgebra.Vector(3, [1, 2, 3])
-      assert.equal((x.add(y)).toString(), '(2,4,6)')
+      assert.strictEqual((x.add(y)).toString(), '(2,4,6)')
     })
   })
   describe('#sub()', function () {
     it('should return vector (0,0,0)', function () {
       var x = new LinearAlgebra.Vector(3, [1, 2, 3])
       var y = new LinearAlgebra.Vector(3, [1, 2, 3])
-      assert.equal((x.sub(y)).toString(), '(0,0,0)')
+      assert.strictEqual((x.sub(y)).toString(), '(0,0,0)')
     })
   })
   describe('#dot()', function () {
     it('should return the dot-product', function () {
       var x = new LinearAlgebra.Vector(3, [1, 2, 3])
       var y = new LinearAlgebra.Vector(3, [5, 6, 7])
-      assert.equal(x.dot(y), 38)
+      assert.strictEqual(x.dot(y), 38)
     })
   })
   describe('#scalar()', function () {
     it('should return the scalar product', function () {
       var x = new LinearAlgebra.Vector(3, [1, 2, 3])
-      assert.equal(x.scalar(2).toString(), '(2,4,6)')
+      assert.strictEqual(x.scalar(2).toString(), '(2,4,6)')
     })
   })
   describe('#norm()', function () {
@@ -73,7 +73,7 @@ describe('Vector operations', function () {
   describe('#size()', function () {
     it('should return the size (not eulidean length!) of the vector', function () {
       var x = LinearAlgebra.randomVectorInt(10, 1, 5)
-      assert.equal(x.size(), 10)
+      assert.strictEqual(x.size(), 10)
     })
   })
   describe('#equal()', function () {
@@ -90,20 +90,20 @@ describe('Methods on vectors', function () {
   describe('#component()', function () {
     it('should return the specified component', function () {
       var x = new LinearAlgebra.Vector(3, [1, 2, 2])
-      assert.equal(x.component(1), 2)
+      assert.strictEqual(x.component(1), 2)
     })
   })
   describe('#changeComponent()', function () {
     it('should return the changed vector', function () {
       var x = new LinearAlgebra.Vector(3, [1, 2, 2])
       x.changeComponent(1, 5)
-      assert.equal(x.toString(), '(1,5,2)')
+      assert.strictEqual(x.toString(), '(1,5,2)')
     })
   })
   describe('#toString()', function () {
     it('should return a string representation of the vector', function () {
       var x = new LinearAlgebra.Vector(4, [9, 0, 3, 1])
-      assert.equal(x.toString(), '(9,0,3,1)')
+      assert.strictEqual(x.toString(), '(9,0,3,1)')
     })
   })
 })
@@ -112,58 +112,102 @@ describe('class Matrix', function () {
   describe('#component()', function () {
     it('should return the specified component', function () {
       var A = new LinearAlgebra.Matrix(2, 2)
-      assert.equal(A.component(0, 1), 0)
-      var B = new LinearAlgebra.Matrix(2, 2, [[1, 2], [3, 4]])
-      assert.equal(B.component(1, 0), 3)
+      assert.strictEqual(A.component(0, 1), 0)
+      var B = new LinearAlgebra.Matrix(2, 2, [
+        [1, 2],
+        [3, 4]
+      ])
+      assert.strictEqual(B.component(1, 0), 3)
     })
   })
   describe('#toString()', function () {
     it('should return a string representation of the matrix', function () {
-      var A = new LinearAlgebra.Matrix(2, 2, [[1, 2], [3, 4]])
-      assert.equal(A.toString(), '|1,2|\n|3,4|')
+      var A = new LinearAlgebra.Matrix(2, 2, [
+        [1, 2],
+        [3, 4]
+      ])
+      assert.strictEqual(A.toString(), '|1,2|\n|3,4|')
     })
   })
   describe('#dimension()', function () {
     it('should return the dimension of the matrix as number array', function () {
-      var A = new LinearAlgebra.Matrix(3, 2, [[1, 2], [3, 4], [5, 6]])
-      assert.equal(A.dimension()[0], 3)
-      assert.equal(A.dimension()[1], 2)
+      var A = new LinearAlgebra.Matrix(3, 2, [
+        [1, 2],
+        [3, 4],
+        [5, 6]
+      ])
+      assert.strictEqual(A.dimension()[0], 3)
+      assert.strictEqual(A.dimension()[1], 2)
     })
   })
   describe('#changeComponent()', function () {
     it('should change the specified component of the matrix', function () {
-      var A = new LinearAlgebra.Matrix(3, 2, [[1, 2], [3, 4], [5, 6]])
+      var A = new LinearAlgebra.Matrix(3, 2, [
+        [1, 2],
+        [3, 4],
+        [5, 6]
+      ])
       A.changeComponent(1, 0, 5)
-      assert.equal(A.component(1, 0), 5)
+      assert.strictEqual(A.component(1, 0), 5)
     })
   })
   describe('#equal()', function () {
     it('should compares the matrices', function () {
-      var A = new LinearAlgebra.Matrix(3, 2, [[1, 2], [3, 4], [5, 6]])
-      var B = new LinearAlgebra.Matrix(3, 2, [[1, 2], [3, 4], [5, 6]])
-      var C = new LinearAlgebra.Matrix(2, 2, [[1, 2], [3, 4]])
-      var D = new LinearAlgebra.Matrix(2, 2, [[1, 2], [5, 4]])
+      var A = new LinearAlgebra.Matrix(3, 2, [
+        [1, 2],
+        [3, 4],
+        [5, 6]
+      ])
+      var B = new LinearAlgebra.Matrix(3, 2, [
+        [1, 2],
+        [3, 4],
+        [5, 6]
+      ])
+      var C = new LinearAlgebra.Matrix(2, 2, [
+        [1, 2],
+        [3, 4]
+      ])
+      var D = new LinearAlgebra.Matrix(2, 2, [
+        [1, 2],
+        [5, 4]
+      ])
       assert.ok(A.equal(B))
       assert.ok(!A.equal(C))
       assert.ok(!C.equal(D))
     })
   })
   describe('#add()', function () {
     it('should return the result of the matrix addition', function () {
-      var A = new LinearAlgebra.Matrix(3, 2, [[1, 2], [3, 4], [5, 6]])
-      var B = new LinearAlgebra.Matrix(3, 2, [[1, 2], [3, 4], [5, 6]])
+      var A = new LinearAlgebra.Matrix(3, 2, [
+        [1, 2],
+        [3, 4],
+        [5, 6]
+      ])
+      var B = new LinearAlgebra.Matrix(3, 2, [
+        [1, 2],
+        [3, 4],
+        [5, 6]
+      ])
       var C = A.add(B)
-      assert.equal(C.component(1, 0), 6)
-      assert.equal(C.component(1, 1), 8)
-      assert.equal(C.component(0, 0), 2)
+      assert.strictEqual(C.component(1, 0), 6)
+      assert.strictEqual(C.component(1, 1), 8)
+      assert.strictEqual(C.component(0, 0), 2)
     })
   })
   describe('#scalar()', function () {
     it('should return the result of the matrix-scalar multiplication', function () {
-      var A = new LinearAlgebra.Matrix(3, 2, [[1, 2], [3, 4], [5, 6]])
+      var A = new LinearAlgebra.Matrix(3, 2, [
+        [1, 2],
+        [3, 4],
+        [5, 6]
+      ])
       var B = A.scalar(2)
-      var C = new LinearAlgebra.Matrix(3, 2, [[2, 4], [6, 8], [10, 12]])
+      var C = new LinearAlgebra.Matrix(3, 2, [
+        [2, 4],
+        [6, 8],
+        [10, 12]
+      ])
       assert.ok(B.equal(C))
     })
   })
-})
+})
diff --git a/maths/pascalTriangle.js b/maths/pascalTriangle.js
@@ -1,4 +1,4 @@
-const numRows = 5                                                                                                                                      
+const numRows = 5
 
 var generate = function (numRows) {
   const triangle = [[1], [1, 1]]

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-const numRows = 5`
	`1`	`+const numRows = 5`
`2`	`2`
`3`	`3`	`var generate = function (numRows) {`
`4`	`4`	`const triangle = [[1], [1, 1]]`