merge: Added manhattan distance and euclidean distance for distance 2 points task (TheAlgorithms#809)

* Added Hex to Binary conversion

* Update Conversions/HexToBinary.js

Co-authored-by: Rak Laptudirm <[email protected]>

* Update Conversions/HexToBinary.js

Co-authored-by: Rak Laptudirm <[email protected]>

* Update Conversions/HexToBinary.js

Co-authored-by: Rak Laptudirm <[email protected]>

* Update Conversions/HexToBinary.js

Co-authored-by: Rak Laptudirm <[email protected]>

* Fix errors

* fix: typo

* Added Manhattan Distance Algorithm

Co-authored-by: Rak Laptudirm <[email protected]>

Author: ddhira123

Maths/Coordinate.js

@@ -4,10 +4,16 @@
  Example: coorDistance(2,2,14,11) will return 15
  Wikipedia reference: https://en.wikipedia.org/wiki/Geographical_distance#Flat-surface_formulae
 */
-const distance2points = (longitude1, latitude1, longitude2, latitude2) => {
+const euclideanDistance = (longitude1, latitude1, longitude2, latitude2) => {
   const width = longitude2 - longitude1
   const height = latitude2 - latitude1
   return (Math.sqrt(width * width + height * height))
 }
 
-export { distance2points }
+const manhattanDistance = (longitude1, latitude1, longitude2, latitude2) => {
+  const width = Math.abs(longitude2 - longitude1)
+  const height = Math.abs(latitude2 - latitude1)
+  return width + height
+}
+
+export { euclideanDistance, manhattanDistance }

Maths/test/Coordinate.test.js

@@ -1,22 +1,43 @@
 import * as coordinate from '../Coordinate'
 
-describe('Testing distance2points calculations', () => {
+describe('Testing euclideanDistance calculations', () => {
   it('Should give a numeric output (distance between 2 points) with 4 numeric arguments', () => {
-    const distance2points = coordinate.distance2points(2, 2, -10, -7)
-    expect(distance2points).toBe(15)
+    const euclideanDistance = coordinate.euclideanDistance(2, 2, -10, -7)
+    expect(euclideanDistance).toBe(15)
   })
   it('Should not give any output given non-numeric argument', () => {
-    const distance2points = coordinate.distance2points('ABC', '123', '', '###')
-    expect(distance2points).toBeNaN()
+    const euclideanDistance = coordinate.euclideanDistance('ABC', '123', '', '###')
+    expect(euclideanDistance).toBeNaN()
   })
   it('Should not give any output given any number of numeric arguments less than 4', () => {
-    const distance2points3arg = coordinate.distance2points(2, 2, -10)
-    const distance2points2arg = coordinate.distance2points(2, 2)
-    const distance2points1arg = coordinate.distance2points(2)
-    const distance2points0arg = coordinate.distance2points()
-    expect(distance2points3arg).toBeNaN()
-    expect(distance2points2arg).toBeNaN()
-    expect(distance2points1arg).toBeNaN()
-    expect(distance2points0arg).toBeNaN()
+    const euclideanDistance3arg = coordinate.euclideanDistance(2, 2, -10)
+    const euclideanDistance2arg = coordinate.euclideanDistance(2, 2)
+    const euclideanDistance1arg = coordinate.euclideanDistance(2)
+    const euclideanDistance0arg = coordinate.euclideanDistance()
+    expect(euclideanDistance3arg).toBeNaN()
+    expect(euclideanDistance2arg).toBeNaN()
+    expect(euclideanDistance1arg).toBeNaN()
+    expect(euclideanDistance0arg).toBeNaN()
+  })
+})
+
+describe('Testing manhattanDistance calculations', () => {
+  it('Should give a numeric output (distance between 2 points) with 4 numeric arguments', () => {
+    const manhattanDistance = coordinate.manhattanDistance(2, 2, -10, -7)
+    expect(manhattanDistance).toBe(21)
+  })
+  it('Should not give any output given non-numeric argument', () => {
+    const manhattanDistance = coordinate.manhattanDistance('ABC', '123', '', '###')
+    expect(manhattanDistance).toBeNaN()
+  })
+  it('Should not give any output given any number of numeric arguments less than 4', () => {
+    const manhattanDistance3arg = coordinate.manhattanDistance(2, 2, -10)
+    const manhattanDistance2arg = coordinate.manhattanDistance(2, 2)
+    const manhattanDistance1arg = coordinate.manhattanDistance(2)
+    const manhattanDistance0arg = coordinate.manhattanDistance()
+    expect(manhattanDistance3arg).toBeNaN()
+    expect(manhattanDistance2arg).toBeNaN()
+    expect(manhattanDistance1arg).toBeNaN()
+    expect(manhattanDistance0arg).toBeNaN()
   })
 })