merge: Fix spellings (#821)

* chore: remove codespell from ci

* feat: add codespell workflow

* fix: codespell workflow

* fix: ignore spellings in directory

* chore: fix spellings

./Dynamic-Programming/KadaneAlgo.js:2: contiguos ==> contiguous
./Dynamic-Programming/KadaneAlgo.js:14: posible ==> possible

* chore: fix spelling

./Dynamic-Programming/SieveOfEratosthenes.js:4: upto ==> up to

* chore: fix spellings

./Dynamic-Programming/MaxNonAdjacentSum.js:22: Exmaple ==> Example

* chore: fix spelling

./Project-Euler/test/Problem010.test.js:4: upto ==> up to
./Project-Euler/test/Problem010.test.js:8: upto ==> up to
./Project-Euler/test/Problem010.test.js:12: upto ==> up to

* chore: fix spelling

./String/AlphaNumericPalindrome.js:10: recieves ==> receives
./String/AlphaNumericPalindrome.js:10: sting ==> string
./String/AlphaNumericPalindrome.js:46: varaible ==> variable

* chore: fix spelling

./String/DiceCoefficient.js:3: stings ==> strings

* chore: fix spelling

./String/test/DiceCoefficient.test.js:9: atleast ==> at least

* chore: fix spelling

./String/test/MaxWord.test.js:8: ba ==> be

* chore: ignore `PermutateString.test.js`

* chore: fix spelling

./String/test/CheckVowels.test.js:62: occurances ==> occurrences

* chore: ignore `SubsequenceRecursive.js`

* chore: fix spelling

./Conversions/TemperatureConversion.js:2: arguement ==> argument

* chore: fix spelling

./Conversions/RailwayTimeConversion.js:7: Formate ==> Format
./Conversions/RailwayTimeConversion.js:8: Formate ==> Format

* chore: remove Linear Algebra

The deleted directory hosted a package which are not accepted by this repository.

* Auto-update DIRECTORY.md

* chore: fix spelling

* chore: fix spellings

* merge: Created composite Simpson's integration method. Tests included. (#819)

* Created composite Simpson's integration method.Tests included

* Minor corrections

* Auto-update DIRECTORY.md

* Styled with standard.js

* chore: remove blank line

* chore: remove blank line

Co-authored-by: ggkogkou <ggkogkou@ggkogkou.gr>
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: Rak Laptudirm <raklaptudirm@gmail.com>

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: remove codespell from ci

* feat: add codespell workflow

* fix: codespell workflow

* fix: ignore spellings in directory

* chore: fix spellings

./Dynamic-Programming/KadaneAlgo.js:2: contiguos ==> contiguous
./Dynamic-Programming/KadaneAlgo.js:14: posible ==> possible

* chore: fix spelling

./Dynamic-Programming/SieveOfEratosthenes.js:4: upto ==> up to

* chore: fix spellings

./Dynamic-Programming/MaxNonAdjacentSum.js:22: Exmaple ==> Example

* chore: fix spelling

./Project-Euler/test/Problem010.test.js:4: upto ==> up to
./Project-Euler/test/Problem010.test.js:8: upto ==> up to
./Project-Euler/test/Problem010.test.js:12: upto ==> up to

* chore: fix spelling

./String/AlphaNumericPalindrome.js:10: recieves ==> receives
./String/AlphaNumericPalindrome.js:10: sting ==> string
./String/AlphaNumericPalindrome.js:46: varaible ==> variable

* chore: fix spelling

./String/DiceCoefficient.js:3: stings ==> strings

* chore: fix spelling

./String/test/DiceCoefficient.test.js:9: atleast ==> at least

* chore: fix spelling

./String/test/MaxWord.test.js:8: ba ==> be

* chore: ignore `PermutateString.test.js`

* chore: fix spelling

./String/test/CheckVowels.test.js:62: occurances ==> occurrences

* chore: ignore `SubsequenceRecursive.js`

* chore: fix spelling

./Conversions/TemperatureConversion.js:2: arguement ==> argument

* chore: fix spelling

./Conversions/RailwayTimeConversion.js:7: Formate ==> Format
./Conversions/RailwayTimeConversion.js:8: Formate ==> Format

* chore: remove Linear Algebra

The deleted directory hosted a package which are not accepted by this repository.

* Auto-update DIRECTORY.md

* chore: fix spelling

* chore: fix spellings

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: fix spelling

* chore: no need to check filenames

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: ggkogkou <76820848+ggkogkou@users.noreply.github.com>
Co-authored-by: ggkogkou <ggkogkou@ggkogkou.gr>

.github/workflows/ci.yml

@@ -20,11 +20,4 @@ jobs:
 
       - name: 💄 Code style
         run: npm run style
-  codespell:
+        
-    name: Check for spelling errors
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: codespell-project/actions-codespell@master
-        with:
-          check_filenames: true      

.github/workflows/codespell.yml

@@ -0,0 +1,13 @@
+name: codespell
+on: [push, pull_request]
+jobs:
+  codespell:
+    name: Check for spelling errors
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: codespell-project/actions-codespell@master
+        with:
+          # file types to ignore
+          skip: "*.json,*.yml,DIRECTORY.md,PermutateString.test.js,SubsequenceRecursive.js"
+          

Backtracking/AllCombinationsOfSizeK.js

@@ -2,7 +2,7 @@
   Problem: Given two numbers, n and k, make all unique combinations of k numbers from 1 to n and in sorted order
 
   What is combinations?
-  - Combinations is selecting items froms a collections without considering order of selection
+  - Combinations is selecting items from a collections without considering order of selection
 
   Example:
   - We have an apple, a banana, and a jackfruit

Conversions/RailwayTimeConversion.js

@@ -4,8 +4,8 @@
     some changes on hours and minutes and if the time in 'PM' it means the only
     want some changes in hour value.
 
-    Input Formate -> 07:05:45PM
+    Input Format -> 07:05:45PM
-    Output Formate -> 19:05:45
+    Output Format -> 19:05:45
 
     Problem & Explanation Source : https://www.mathsisfun.com/time.html
 */

Conversions/TemperatureConversion.js

@@ -1,5 +1,5 @@
 // This files has functions to convert different temperature units
-// Functions take temperature value as a arguement and returns corresponding converted value
+// Functions take temperature value as a argument and returns corresponding converted value
 
 const celsiusToFahrenheit = (celsius) => {
   // Wikipedia reference: https://en.wikipedia.org/wiki/Celsius

DIRECTORY.md

@@ -135,12 +135,6 @@
   * [SHA1](https://github.com/TheAlgorithms/Javascript/blob/master/Hashes/SHA1.js)
   * [SHA256](https://github.com/TheAlgorithms/Javascript/blob/master/Hashes/SHA256.js)
 
-## Linear-Algebra
-  * src
-    * [la_lib](https://github.com/TheAlgorithms/Javascript/blob/master/Linear-Algebra/src/la_lib.js)
-  * test
-    * [test](https://github.com/TheAlgorithms/Javascript/blob/master/Linear-Algebra/test/test.js)
-
 ## Maths
   * [Abs](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/Abs.js)
   * [AliquotSum](https://github.com/TheAlgorithms/Javascript/blob/master/Maths/AliquotSum.js)

Data-Structures/Array/NumberOfLocalMaximumPoints.js

@@ -2,7 +2,7 @@
  * [NumberOfLocalMaximumPoints](https://www.geeksforgeeks.org/find-indices-of-all-local-maxima-and-local-minima-in-an-array/) is an algorithm to find relative bigger numbers compared to their neighbors
  *
  * Notes:
- * - like the other similar local maxima search function find relative maxima points in array but doesnt stop at one but returns total point count
+ * - like the other similar local maxima search function find relative maxima points in array but doesn't stop at one but returns total point count
  * - runs on array A of size n and returns the local maxima count using divide and conquer methodology
  *
  * @complexity: O(n) (on average )

Data-Structures/Array/test/LocalMaximomPoint.test.js

@@ -1,17 +1,17 @@
 import { LocalMaximomPoint } from '../LocalMaximomPoint'
 
-describe('LocalMaximomPoint tests', () => {
+describe('LocalMaximumPoint tests', () => {
-  it('test boundry maximom points - last element', () => {
+  it('test boundary maximum points - last element', () => {
     const Array = [1, 2, 3, 4, 5, 6, 12]
     expect(LocalMaximomPoint(Array)).toEqual(6)
   })
 
-  it('test boundry maximom points - first element', () => {
+  it('test boundary maximum points - first element', () => {
     const Array2 = [13, 6, 5, 4, 3, 2, 1]
     expect(LocalMaximomPoint(Array2)).toEqual(0)
   })
 
-  it('test boundry maximom points - should find first maximom point from the top', () => {
+  it('test boundary maximum points - should find first maximom point from the top', () => {
     // Test a mix of number types (i.e., positive/negative, numbers with decimals, fractions)
     const Array = [13, 2, 3, 4, 5, 6, 12]
     expect(LocalMaximomPoint(Array)).toEqual(6)

Data-Structures/Array/test/NumberOfLocalMaximumPoints.test.js

@@ -1,41 +1,41 @@
 import { NumberOfLocalMaximumPoints } from '../NumberOfLocalMaximumPoints'
 
 describe('LocalMaximomPoint tests', () => {
-  it('test boundry maximom points - last element', () => {
+  it('test boundary maximum points - last element', () => {
     const Array = [1, 2, 3, 4, 5, 6, 12]
     expect(NumberOfLocalMaximumPoints(Array)).toEqual(1)
   })
 
-  it('test boundry maximom points - first element', () => {
+  it('test boundary maximum points - first element', () => {
     const Array = [13, 6, 5, 4, 3, 2, 1]
     expect(NumberOfLocalMaximumPoints(Array)).toEqual(1)
   })
 
-  it('test boundry maximom points - both boundries have maximum points', () => {
+  it('test boundary maximum points - both boundaries have maximum points', () => {
     // Test a mix of number types (i.e., positive/negative, numbers with decimals, fractions)
     const Array = [13, 2, 3, 4, 5, 6, 12]
     expect(NumberOfLocalMaximumPoints(Array)).toEqual(2)
   })
 
-  it('multiple maximom points in the middle', () => {
+  it('multiple maximum points in the middle', () => {
     // Test a mix of number types (i.e., positive/negative, numbers with decimals, fractions)
     const Array = [1, 3, 2, 5, 6, 9, 2, 7, 12, 1, 0]
     expect(NumberOfLocalMaximumPoints(Array)).toEqual(3)
   })
 
-  it('multiple maximom points in the middle with one at end', () => {
+  it('multiple maximum points in the middle with one at end', () => {
     // Test a mix of number types (i.e., positive/negative, numbers with decimals, fractions)
     const Array = [1, 3, 2, 5, 6, 9, 2, 7, 12, 1, 10]
     expect(NumberOfLocalMaximumPoints(Array)).toEqual(4)
   })
 
-  it('multiple maximom points in the middle with one at start', () => {
+  it('multiple maximum points in the middle with one at start', () => {
     // Test a mix of number types (i.e., positive/negative, numbers with decimals, fractions)
     const Array = [10, 3, 2, 5, 6, 9, 2, 7, 12, 1, 0]
     expect(NumberOfLocalMaximumPoints(Array)).toEqual(3)
   })
 
-  it('multiple maximom points in the middle with two more at both ends', () => {
+  it('multiple maximum points in the middle with two more at both ends', () => {
     // Test a mix of number types (i.e., positive/negative, numbers with decimals, fractions)
     const Array = [10, 3, 11, 5, 6, 9, 2, 7, 12, 1, 10]
     expect(NumberOfLocalMaximumPoints(Array)).toEqual(5)

Data-Structures/Heap/MinPriorityQueue.js

@@ -57,7 +57,7 @@ class MinPriorityQueue {
     output(this.heap.slice(1))
   }
 
-  // heap reverse can be done by performing swaping the first
+  // heap reverse can be done by performing swapping the first
   // element with the last, removing the last element to
   // new array and calling sink function.
   heapReverse () {

Dynamic-Programming/KadaneAlgo.js

@@ -1,5 +1,5 @@
 /* Kadane's algorithm is one of the most efficient ways to
- * calculate the maximum contiguos subarray sum for a given array.
+ * calculate the maximum contiguous subarray sum for a given array.
  * Below is the implementation of kadanes's algorithm along with
  * some sample test cases.
  * There might be a special case in this problem if al the elements
@@ -11,7 +11,7 @@
 
 export function kadaneAlgo (array) {
   let cummulativeSum = 0
-  let maxSum = Number.NEGATIVE_INFINITY // maxSum has the least posible value
+  let maxSum = Number.NEGATIVE_INFINITY // maxSum has the least possible value
   for (let i = 0; i < array.length; i++) {
     cummulativeSum = cummulativeSum + array[i]
     if (maxSum < cummulativeSum) {

Dynamic-Programming/MaxNonAdjacentSum.js

@@ -19,7 +19,7 @@ function maximumNonAdjacentSum (nums) {
   return Math.max(maxExcluding, maxIncluding)
 }
 
-// Exmaple
+// Example
 
 // maximumNonAdjacentSum([1, 2, 3]))
 // maximumNonAdjacentSum([1, 5, 3, 7, 2, 2, 6]))

Dynamic-Programming/SieveOfEratosthenes.js

@@ -1,7 +1,7 @@
 function sieveOfEratosthenes (n) {
   /*
      * Calculates prime numbers till a number n
-     * :param n: Number upto which to calculate primes
+     * :param n: Number up to which to calculate primes
      * :return: A boolean list containing only primes
      */
   const primes = new Array(n + 1)

Hashes/SHA1.js

@@ -34,7 +34,7 @@ function pad (str, bits) {
  * @return {array} - array of original string split into chunks
  *
  * @example
- *      chunkify("this is a test", 2); // ["th", "is", " i", "s ", "a ", "te", "st"]
+ *      chunkify("this is a test", 2)
  */
 function chunkify (str, size) {
   const chunks = []

Hashes/SHA256.js

@@ -45,7 +45,7 @@ function pad (str, bits) {
  * @return {array} - array of original string split into chunks
  *
  * @example
- *      chunkify("this is a test", 2); // ["th", "is", " i", "s ", "a ", "te", "st"]
+ *      chunkify("this is a test", 2)
  */
 function chunkify (str, size) {
   const chunks = []
@@ -76,7 +76,7 @@ function rotateRight (bits, turns) {
  * @return {string} - processed message
  */
 function preProcess (message) {
-  // covert message to binary representation padded to
+  // convert message to binary representation padded to
   // 8 bits, and add 1
   let m = message.split('')
     .map(e => e.charCodeAt(0))

Linear-Algebra/README.md

@@ -1,114 +0,0 @@
-# Linear algebra library for JavaScript  
-
-This library contains some useful classes and functions for dealing with linear algebra in JavaScript.  
-The library was orginal written in **TypeScript** and then compiles into pure JavaScript.  
-
----
-
-## Overview  
-
-- class Vector : This class represents a vector of arbitray size and operations on it.  
-    - constructor Vector(N) : creates a zero vector of size N   
-    - constructor Vector(N, components) : creates a vector of size N with the given components.   
-    - createUnitBasis(pos) : converts this vector in a unit basis vector and returns it.  
-    - component(pos) : returns the specified component (indexing at 0)  
-    - changeComponent(pos, value) : change the specified component.  
-    - toString() : returns a string representation of this vector.  
-    - size() : returns the size of the vector. (not the eulidean length!)  
-    - eulideanLength() : computes the eulidean length of this vector.  
-    - add(other) : vector addition, returns the rersult.  
-    - sub(other) : vector subtraction, returns the rersult.  
-    - dot(other) : computes the dot-product and returns it.  
-    - scalar(s)  : scalar (s) multiplication. returns the result.  
-    - norm() : normalizes this vector and returns it.  
-    - equal(other) : returns true if the vectors are equal, otherwise false.  
-
-- function unitBasisVector(N,pos) : returns a unit basis vector of size N with a One on position 'pos'  
-- function randomVectorInt(N,a,b) : returns a random vector with integer components (between 'a' and 'b') of size N.  
-- function randomVectorFloat(N,a,b) : returns a random vector with floating point components (between 'a' and 'b') of size N.    
-
-- class Matrix : This class represents a matrix of arbitrary size and operations on it.  
-    - constructor(rows, cols) : creates a zero matrix of dimension rows x cols.  
-    - constructor(rows, cols, components) : creates a matrix with fix numbers of dimension rows x cols.  
-    - component(x,y) : returns the specified component.  
-    - changeComponent(x,y,value) : changes the specified component with the new value 'value'.  
-    - toString() : returns a string representation of this matrix.  
-    - dimension() : returns the dimension of this matrix as number arras [rows,cols].  
-    - add(other) : returns the result of the matrix addition.  
-    - equal(other) : returns true if the matrices are equal, otherwise false.  
-    - scalar(c) : returns the result of the matrix-scalar multiplication.  
----
-
-## Documentation  
-
-The module is well documented in its source code. Look in the TypeScript file ```la_lib.ts```.  
-
----
-
-## Usage  
-
-You will find the library in the **src** directory its called ```la_lib.js```. You simply need to  
-include this library in your project **(you don't install anything)**. After that:  
-
-```js
-    var x = LinearAlgebra.Vector(...);
-```  
-
-The namespace LinearAlgebra contains useful classes and functions for dealing with linear algebra under JavaScript.  
-
-Some examples:  
-
-```js
-// ---------------------------- Examples ------------------------------------------
-
-// creates vectors 
-var x = new LinearAlgebra.Vector(5, [1, 2, 3, 4, 5]);
-var y = new LinearAlgebra.Vector(5, [1, 2, 3, 4, 5]);
-
-// prints size of the vector
-console.log(x.size()); // ==> 5
-
-// changes the 2-th component with 7
-//x.changeComponent(2,7);
-
-// print the 2-th component.
-console.log(x.component(2)); // ==> 3
-
-// prints the full vector as string.
-console.log(x.toString()); // ==> (1,2,3,4,5)
-
-// vector addition
-console.log(x.add(y).toString()); // ==> (2,3,6,8,10)
-
-//console.log(x.createUnitBasis(1).toString());
-
-// computes the dot-product
-console.log(x.dot(y)); // ==> 55
-
-// computes and prints the scalar-product
-console.log(x.scalar(5).toString()); // ==> (5,10,15,20,25)
-
-// creates a unit basis vector
-console.log(LinearAlgebra.unitBasisVector(3, 0).toString()); // ==> (1,0,0)
-
-// creates random vectors
-console.log(LinearAlgebra.randomVectorInt(3, 0, 5).toString());
-console.log(LinearAlgebra.randomVectorFloat(3, 0, 5).toString());
-```  
-
----
-
-## Tests  
-
-Go in the directory of the project and type in:  
-```npm install```  
-```npm test```  
-The test-suite use the JavaScript test-framework **mocha**.  
-
----
-
-## Contributing  
-
-You can contribute to this project. Feel free and pull request some new features or documention.   
-**TODO:** Global functions for special matrices.  
-**TODO:** Documention of the classes and functions.  

Linear-Algebra/package-lock.json

@@ -1,171 +0,0 @@
-{
-  "name": "linear-algebra-javascript",
-  "version": "1.0.0",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "balanced-match": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
-    },
-    "brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "requires": {
-        "balanced-match": "1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
-    "browser-stdout": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
-      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw=="
-    },
-    "commander": {
-      "version": "2.11.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.11.0.tgz",
-      "integrity": "sha512-b0553uYA5YAEGgyYIGYROzKQ7X5RAqedkfjiZxwi0kL1g3bOaBNNZfYkzt/CL0umgD5wc9Jec2FbB98CjkMRvQ=="
-    },
-    "concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
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-      "requires": {
-        "ms": "2.0.0"
-      }
-    },
-    "diff": {
-      "version": "3.3.1",
-      "resolved": "https://registry.npmjs.org/diff/-/diff-3.3.1.tgz",
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-    "escape-string-regexp": {
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-      "requires": {
-        "fs.realpath": "1.0.0",
-        "inflight": "1.0.6",
-        "inherits": "2.0.3",
-        "minimatch": "3.0.4",
-        "once": "1.4.0",
-        "path-is-absolute": "1.0.1"
-      }
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-    "growl": {
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-}

Linear-Algebra/package.json

@@ -1,17 +0,0 @@
-{
-  "name": "linear-algebra-javascript",
-  "version": "1.0.0",
-  "description": "simple linear algebra library for JavaScript",
-  "main": "index.js",
-  "directories": {
-    "test": "test"
-  },
-  "scripts": {
-    "test": "mocha"
-  },
-  "author": "Christian Bender",
-  "license": "MIT",
-  "dependencies": {
-    "mocha": "^5.0.2"
-  }
-}

Linear-Algebra/src/la_lib.js

@@ -1,313 +0,0 @@
-/*
-    author: Christian Bender
-    license: MIT-license
-
-    The namespace LinearAlgebra contains useful classes and functions for dealing with
-    linear algebra under JavaScript.
-*/
-let LinearAlgebra;
-(function (LinearAlgebra) {
-  /*
-        class: Vector
-        This class represents a vector of arbitrary size and operations on it.
-    */
-  const Vector = /** @class */ (function () {
-    // constructor
-    function Vector (N, comps) {
-      if (comps === undefined) {
-        comps = []
-      }
-      this.components = new Array(N)
-      if (comps.length === 0) {
-        for (let i = 0; i < N; i++) {
-          this.components[i] = 0.0
-        }
-      } else {
-        if (N === comps.length) {
-          this.components = comps
-        } else {
-          throw new Error('Vector: invalid size!')
-        }
-      }
-    } // end of constructor
-    // returns the size of this vector.
-    // not the eulidean length!
-    Vector.prototype.size = function () {
-      return this.components.length
-    }
-    // computes the eulidean length.
-    Vector.prototype.eulideanLength = function () {
-      let sum = 0
-      for (let i = 0; i < this.components.length; i++) {
-        sum += this.components[i] * this.components[i]
-      }
-      return Math.sqrt(sum)
-    }
-    // getter for the components of the vector.
-    // returns a specified component (index)
-    Vector.prototype.component = function (index) {
-      return this.components[index]
-    }
-    // setter for a specified component of this vector.
-    Vector.prototype.changeComponent = function (index, value) {
-      if (index >= 0 && index < this.components.length) {
-        this.components[index] = value
-      } else {
-        throw new Error('changeComponent: index out of bounds!')
-      }
-    }
-    // vector addition
-    Vector.prototype.add = function (other) {
-      if (this.size() === other.size()) {
-        const SIZE = this.size()
-        const ans = new Vector(SIZE)
-        for (let i = 0; i < SIZE; i++) {
-          ans.changeComponent(i, (this.components[i] + other.component(i)))
-        }
-        return ans
-      } else {
-        throw new Error('add: vector must have same size!')
-      }
-    }
-    // vector subtraction
-    Vector.prototype.sub = function (other) {
-      if (this.size() === other.size()) {
-        const SIZE = this.size()
-        const ans = new Vector(SIZE)
-        for (let i = 0; i < SIZE; i++) {
-          ans.changeComponent(i, (this.components[i] - other.component(i)))
-        }
-        return ans
-      } else {
-        throw new Error('add: vector must have same size!')
-      }
-    }
-    // dot-product
-    Vector.prototype.dot = function (other) {
-      let sum = 0
-      if (other.size() === this.size()) {
-        const SIZE = other.size()
-        for (let i = 0; i < SIZE; i++) {
-          sum += this.components[i] * other.component(i)
-        }
-        return sum
-      } else {
-        throw new Error('dot: vectors must have same size!')
-      }
-    }
-    // scalar multiplication
-    Vector.prototype.scalar = function (s) {
-      const SIZE = this.size()
-      const ans = new Vector(SIZE)
-      for (let i = 0; i < SIZE; i++) {
-        ans.changeComponent(i, (this.components[i] * s))
-      }
-      return ans
-    }
-    // returns a string representation of this vector.
-    Vector.prototype.toString = function () {
-      let ans = '('
-      const SIZE = this.components.length
-      for (let i = 0; i < SIZE; i++) {
-        if (i < SIZE - 1) {
-          ans += this.components[i] + ','
-        } else {
-          ans += this.components[i] + ')'
-        }
-      }
-      return ans
-    }
-    // converts this vector in a unit basis vector and returns it.
-    // the One is on position 'pos'
-    Vector.prototype.createUnitBasis = function (pos) {
-      if (pos >= 0 && pos < this.components.length) {
-        for (let i = 0; i < this.components.length; i++) {
-          if (i === pos) {
-            this.components[i] = 1.0
-          } else {
-            this.components[i] = 0.0
-          }
-        }
-      } else {
-        throw new Error('createUnitBasis: index out of bounds')
-      }
-      return this
-    }
-    // normalizes this vector and returns it.
-    Vector.prototype.norm = function () {
-      const SIZE = this.size()
-      const quotient = 1.0 / this.eulideanLength()
-      for (let i = 0; i < SIZE; i++) {
-        this.components[i] = this.components[i] * quotient
-      }
-      return this
-    }
-    // returns true if the vectors are equal otherwise false.
-    Vector.prototype.equal = function (other) {
-      let ans = true
-      const SIZE = this.size()
-      const EPSILON = 0.001
-      if (SIZE === other.size()) {
-        for (let i = 0; i < SIZE; i++) {
-          if (Math.abs(this.components[i] - other.component(i)) > EPSILON) {
-            ans = false
-          }
-        }
-      } else {
-        ans = false
-      }
-      return ans
-    }
-    return Vector
-  }()) // end of class Vector
-  LinearAlgebra.Vector = Vector
-  // -------------- global functions ---------------------------------
-  // returns a unit basis vector of size N with a One on position 'pos'
-  function unitBasisVector (N, pos) {
-    const ans = new Vector(N)
-    for (let i = 0; i < N; i++) {
-      if (i === pos) {
-        ans.changeComponent(i, 1.0)
-      } else {
-        ans.changeComponent(i, 0)
-      }
-    }
-    return ans
-  }
-  LinearAlgebra.unitBasisVector = unitBasisVector
-  // returns a random vector with integer components (between 'a' and 'b') of size N.
-  function randomVectorInt (N, a, b) {
-    const ans = new Vector(N)
-    for (let i = 0; i < N; i++) {
-      ans.changeComponent(i, (Math.floor((Math.random() * b) + a)))
-    }
-    return ans
-  }
-  LinearAlgebra.randomVectorInt = randomVectorInt
-  // returns a random vector with floating point components (between 'a' and 'b') of size N.
-  function randomVectorFloat (N, a, b) {
-    const ans = new Vector(N)
-    for (let i = 0; i < N; i++) {
-      ans.changeComponent(i, ((Math.random() * b) + a))
-    }
-    return ans
-  }
-  LinearAlgebra.randomVectorFloat = randomVectorFloat
-  // ------------------ end of global functions -----------------------------
-  /*
-        class: Matrix
-        This class represents a matrix of arbitrary size and operations on it.
-    */
-  const Matrix = /** @class */ (function () {
-    // constructor for zero-matrix or fix number matrix.
-    function Matrix (row, col, comps) {
-      if (comps === undefined) {
-        comps = []
-      }
-      if (comps.length === 0) {
-        this.matrix = []
-        let rowVector = []
-        for (let i = 0; i < row; i++) {
-          for (let j = 0; j < col; j++) {
-            rowVector[j] = 0
-          }
-          this.matrix[i] = rowVector
-          rowVector = []
-        }
-      } else {
-        this.matrix = comps
-      }
-      this.rows = row
-      this.cols = col
-    }
-    // returns the specified component.
-    Matrix.prototype.component = function (x, y) {
-      if (x >= 0 && x < this.rows && y >= 0 && y < this.cols) {
-        return this.matrix[x][y]
-      } else {
-        throw new Error('component: index out of bounds')
-      }
-    }
-    // changes the specified component with value 'value'.
-    Matrix.prototype.changeComponent = function (x, y, value) {
-      if (x >= 0 && x < this.rows && y >= 0 && y < this.cols) {
-        this.matrix[x][y] = value
-      } else {
-        throw new Error('changeComponent: index out of bounds')
-      }
-    }
-    // returns a string representation of this matrix.
-    Matrix.prototype.toString = function () {
-      let ans = ''
-      for (let i = 0; i < this.rows; i++) {
-        ans += '|'
-        for (let j = 0; j < this.cols; j++) {
-          if (j < this.cols - 1) {
-            ans += this.matrix[i][j] + ','
-          } else {
-            if (i < this.rows - 1) {
-              ans += this.matrix[i][j] + '|\n'
-            } else {
-              ans += this.matrix[i][j] + '|'
-            }
-          }
-        }
-      }
-      return ans
-    }
-    // returns the dimension rows x cols as number array
-    Matrix.prototype.dimension = function () {
-      const 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]) {
-        const ans = new Matrix(this.rows, this.cols)
-        for (let i = 0; i < this.rows; i++) {
-          for (let j = 0; j < this.cols; j++) {
-            ans.changeComponent(i, j, (this.matrix[i][j] + other.component(i, j)))
-          }
-        }
-        return ans
-      } else {
-        throw new Error('add: matrices must have same dimension!')
-      }
-    }
-    // returns true if the matrices are equal, otherwise false.
-    Matrix.prototype.equal = function (other) {
-      let ans = true
-      const EPSILON = 0.001
-      if (this.rows === other.dimension()[0] &&
-        this.cols === other.dimension()[1]) {
-        for (let i = 0; i < this.rows; i++) {
-          for (let j = 0; j < this.cols; j++) {
-            if (Math.abs(this.matrix[i][j] - other.component(i, j)) > EPSILON) {
-              ans = false
-            }
-          }
-        }
-      } else {
-        ans = false
-      }
-      return ans
-    }
-    // matrix-scalar multiplication
-    Matrix.prototype.scalar = function (c) {
-      const ans = new Matrix(this.rows, this.cols)
-      for (let i = 0; i < this.rows; i++) {
-        for (let j = 0; j < this.cols; j++) {
-          ans.changeComponent(i, j, (this.matrix[i][j] * c))
-        }
-      }
-      return ans
-    }
-    return Matrix
-  }()) // end of class Matrix
-  LinearAlgebra.Matrix = Matrix
-})(LinearAlgebra || (LinearAlgebra = {})) // end of namespace LinearAlgebra
-
-export { LinearAlgebra }

Linear-Algebra/test/test.js

@@ -1,213 +0,0 @@
-/*
-    author: Christian Bender
-    license: MIT-license
-
-    This file contains the test-suite for the linear algebra library.
-    The tests use javascript test-framework mocha
-*/
-
-/* eslint-disable */
-
-import { LinearAlgebra } from '../src/la_lib'
-import * as assert from 'assert'
-
-// file is included here
-// Tests goes here
-
-// creating some vectors
-describe('Create Vectors', function () {
-  describe('#toString()', function () {
-    it('should return a string representation', function () {
-      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.strictEqual(LinearAlgebra.unitBasisVector(3, 1).toString(), '(0,1,0)')
-    })
-  })
-})
-
-// operations on it.
-describe('Vector operations', function () {
-  describe('#add()', 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.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.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.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.strictEqual(x.scalar(2).toString(), '(2,4,6)')
-    })
-  })
-  describe('#norm()', function () {
-    it('should return the normalizes vector', function () {
-      var x = new LinearAlgebra.Vector(4, [9, 0, 3, 1])
-      var y = x.norm()
-      assert.ok(Math.abs(y.component(0) - (9.0 / Math.sqrt(91))) <= 0.01)
-    })
-  })
-  describe('#eulideanLength()', function () {
-    it('should return the eulidean length of the vector', function () {
-      var x = new LinearAlgebra.Vector(3, [1, 2, 2])
-      assert.ok(Math.abs(x.eulideanLength() - 3) <= 0.001)
-    })
-  })
-  describe('#size()', function () {
-    it('should return the size (not eulidean length!) of the vector', function () {
-      var x = LinearAlgebra.randomVectorInt(10, 1, 5)
-      assert.strictEqual(x.size(), 10)
-    })
-  })
-  describe('#equal()', function () {
-    it('should compares two vectors', function () {
-      var x = new LinearAlgebra.Vector(3, [1, 2, 2])
-      var y = new LinearAlgebra.Vector(3, [1, 2, 3])
-      assert.ok(x.equal(x))
-      assert.ok(!x.equal(y))
-    })
-  })
-})
-
-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.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.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.strictEqual(x.toString(), '(9,0,3,1)')
-    })
-  })
-})
-
-describe('class Matrix', function () {
-  describe('#component()', function () {
-    it('should return the specified component', function () {
-      var A = new LinearAlgebra.Matrix(2, 2)
-      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.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.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]
-      ])
-      A.changeComponent(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]
-      ])
-      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 C = A.add(B)
-      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 B = A.scalar(2)
-      var C = new LinearAlgebra.Matrix(3, 2, [
-        [2, 4],
-        [6, 8],
-        [10, 12]
-      ])
-      assert.ok(B.equal(C))
-    })
-  })
-})

Maths/BinaryExponentiationIterative.js

@@ -12,13 +12,13 @@
 //          = exponent(x*x, floor(n/2))   ; if n is odd
 //          = x*exponent(x*x, floor(n/2)) ; if n is even
 const exponent = (x, n) => {
-  let ans = 1
+  let answer = 1
   while (n > 0) {
-    if (n % 2 !== 0) ans *= x
+    if (n % 2 !== 0) answer *= x
     n = Math.floor(n / 2)
     if (n > 0) x *= x
   }
-  return ans
+  return answer
 }
 
 export { exponent }

Maths/DecimalIsolate.js

@@ -5,6 +5,6 @@
  */
 
 export const decimalIsolate = (number) => {
-  const ans = parseFloat((number + '').replace(/^[-\d]+./, '.'))
+  const answer = parseFloat((number + '').replace(/^[-\d]+./, '.'))
-  return isNaN(ans) === true ? 0 : ans
+  return isNaN(answer) === true ? 0 : answer
 }

Maths/FigurateNumber.js

@@ -1,5 +1,5 @@
 /**
- Problem Statment and Explanation :
+ Problem Statement and Explanation :
  Triangular  => https://en.wikipedia.org/wiki/Triangular_number
  Tetrahedral => https://en.wikipedia.org/wiki/Tetrahedral_number
  Pentatope   => https://en.wikipedia.org/wiki/Pentatope_number

Maths/MatrixExponentiationRecursive.js

@@ -22,27 +22,27 @@ const Identity = (n) => {
   return res
 }
 
-const MatMult = (matA, matB) => {
+const MatMult = (matrixA, matrixB) => {
-  // Input: matA: 2D Array of Numbers of size n x n
+  // Input: matrixA: 2D Array of Numbers of size n x n
-  //        matB: 2D Array of Numbers of size n x n
+  //        matrixB: 2D Array of Numbers of size n x n
-  // Output: matA x matB: 2D Array of Numbers of size n x n
+  // Output: matrixA x matrixB: 2D Array of Numbers of size n x n
   // Complexity: O(n^3)
-  const n = matA.length
+  const n = matrixA.length
-  const matC = []
+  const matrixC = []
   for (let i = 0; i < n; i++) {
-    matC[i] = []
+    matrixC[i] = []
     for (let j = 0; j < n; j++) {
-      matC[i][j] = 0
+      matrixC[i][j] = 0
     }
   }
   for (let i = 0; i < n; i++) {
     for (let j = 0; j < n; j++) {
       for (let k = 0; k < n; k++) {
-        matC[i][j] += matA[i][k] * matB[k][j]
+        matrixC[i][j] += matrixA[i][k] * matrixB[k][j]
       }
     }
   }
-  return matC
+  return matrixC
 }
 
 export const MatrixExponentiationRecursive = (mat, m) => {

Maths/MatrixMultiplication.js

@@ -17,7 +17,7 @@ const matrixCheck = (matrix) => {
   }
 }
 
-// tests to see if the matrices have a like side, i.e. the row length on the first matrix matches the column length on the second matrix, or vise versa.
+// tests to see if the matrices have a like side, i.e. the row length on the first matrix matches the column length on the second matrix, or vice versa.
 const twoMatricesCheck = (first, second) => {
   const [firstRowLength, secondRowLength, firstColLength, secondColLength] = [first.length, second.length, matrixCheck(first), matrixCheck(second)]
   if (firstRowLength !== secondColLength || secondRowLength !== firstColLength) {

Maths/SieveOfEratosthenes.js

@@ -1,7 +1,7 @@
 const sieveOfEratosthenes = (n) => {
   /*
    * Calculates prime numbers till a number n
-   * :param n: Number upto which to calculate primes
+   * :param n: Number up to which to calculate primes
    * :return: A boolean list containing only primes
    */
   const primes = new Array(n + 1)

Maths/SimpsonIntegration.js

@@ -59,7 +59,7 @@ function integralEvaluation (N, a, b, func) {
 
   result *= temp
 
-  if (Number.isNaN(result)) { throw Error('Result is NaN. The input interval doesnt belong to the functions domain') }
+  if (Number.isNaN(result)) { throw Error("Result is NaN. The input interval doesn't belong to the functions domain") }
 
   return result
 }

Project-Euler/test/Problem010.test.js

@@ -1,15 +1,15 @@
 import { calculateSumOfPrimeNumbers } from '../Problem010'
 
 describe('checkAnagram', () => {
-  it('Return the sum of prime numbers upto but less than 14', () => {
+  it('Return the sum of prime numbers up to but less than 14', () => {
     const SUT = calculateSumOfPrimeNumbers(14)
     expect(SUT).toBe(41)
   })
-  it('Return the sum of prime numbers upto but less than 10', () => {
+  it('Return the sum of prime numbers up to but less than 10', () => {
     const SUT = calculateSumOfPrimeNumbers(10)
     expect(SUT).toBe(17)
   })
-  it('Return the sum of prime numbers upto but less than 100', () => {
+  it('Return the sum of prime numbers up to but less than 100', () => {
     const SUT = calculateSumOfPrimeNumbers(100)
     expect(SUT).toBe(1060)
   })

String/AlphaNumericPalindrome.js

@@ -7,7 +7,7 @@
 /*****************************************************************************
  * What is a palindrome? https://en.wikipedia.org/wiki/Palindrome
  *
- * The function alphaNumericPlaindrome() recieves a sting with varying formats
+ * The function alphaNumericPlaindrome() receives a string with varying formats
  * like "racecar", "RaceCar", and "race CAR"
  * The string can also have special characters
  * like "2A3*3a2", "2A3 3a2", and "2_A3*3#A2"
@@ -43,7 +43,7 @@ const alphaNumericPlaindrome = (str) => {
   // iterate through the arr and check the condition of palindrome
   for (let i = 0; i < arr.length; i++) {
     if (arr[i] !== arrRev[arr.length - 1 - i]) {
-      // if the string is not palindrome then we change palin varaible to 1
+      // if the string is not palindrome then we change palin variable to 1
       palin = 1
     }
   }

String/DiceCoefficient.js

@@ -1,6 +1,6 @@
 /* The Sørensen–Dice coefficient is a statistic used to gauge the similarity of two samples.
  * Applied to strings, it can give you a value between 0 and 1 (included) which tells you how similar they are.
- * Dice coefficient is calculated by comparing the bigrams of both stings,
+ * Dice coefficient is calculated by comparing the bigrams of both strings,
  * a bigram is a substring of the string of length 2.
  * read more: https://en.wikipedia.org/wiki/S%C3%B8rensen%E2%80%93Dice_coefficient
  */

String/test/CheckVowels.test.js

@@ -59,7 +59,7 @@ describe('Test the checkVowels function', () => {
     expect(countVowels).toBe(0)
   })
 
-  it('should count multiple occurances of the same vowel in the input', () => {
+  it('should count multiple occurrences of the same vowel in the input', () => {
     const value = 'aaaaa'
     const countVowels = checkVowels(value)
     expect(countVowels).toBe(5)

String/test/DiceCoefficient.test.js

@@ -6,7 +6,7 @@ describe('diceCoefficient', () => {
     expect(diceCoefficient('abc', 'abc')).toBe(1)
     expect(diceCoefficient('', '')).toBe(1)
 
-    // string length needs to be atleast 2 (unless equal)
+    // string length needs to be at least 2 (unless equal)
     expect(diceCoefficient('a', '')).toBe(0)
     expect(diceCoefficient('', 'a')).toBe(0)
 

String/test/MaxWord.test.js

@@ -5,8 +5,8 @@ describe('Testing the maxWord function', () => {
     expect(() => maxWord(10)).toThrow()
   })
   it('get the max word', () => {
-    const string = 'ba ba ba ba banana'
+    const string = 'be be be be a a banana'
     const mostOccurringWord = maxWord(string)
-    expect(mostOccurringWord).toBe('ba')
+    expect(mostOccurringWord).toBe('be')
   })
 })

Trees/test/BreadthFirstTreeTraversal.test.js

@@ -11,7 +11,7 @@ describe('Breadth First Tree Traversal', () => {
   root.right.right = new Node(9)
   binaryTree.root = root
 
-  // Vizualization :
+  // Visualization :
   //
   //            7
   //           / \