Make Fibonacci.js file comply with standard JS rules

Author: rahul1995

Maths/Fibonacci.js

@@ -72,11 +72,11 @@ const FibonacciDpWithoutRecursion = (number) => {
 // Using Matrix exponentiation to find n-th fibonacci in O(log n) time
 
 const copyMatrix = (A) => {
-  return A.map(row => row.map(cell => cell));
+  return A.map(row => row.map(cell => cell))
 }
 
 const Identity = (size) => {
-  const I = Array(size).fill(null).map(() => Array(size).fill());
+  const I = Array(size).fill(null).map(() => Array(size).fill())
   return I.map((row, rowIdx) => row.map((_col, colIdx) => {
     return rowIdx === colIdx ? 1 : 0
   }))
@@ -90,12 +90,12 @@ const matrixMultiply = (A, B) => {
   const l = A.length
   const m = B.length
   const n = B[0].length // Assuming non-empty matrices
-  const C = Array(l).fill(null).map(() => Array(n).fill());
-  for(let i = 0; i < l; i++) {
-    for(let j = 0; j < n; j++) {
+  const C = Array(l).fill(null).map(() => Array(n).fill())
+  for (let i = 0; i < l; i++) {
+    for (let j = 0; j < n; j++) {
       C[i][j] = 0
-      for(let k = 0; k < m; k++) {
-        C[i][j] += A[i][k]*B[k][j]
+      for (let k = 0; k < m; k++) {
+        C[i][j] += A[i][k] * B[k][j]
       }
     }
   }
@@ -105,41 +105,41 @@ const matrixMultiply = (A, B) => {
 // A is a square matrix
 const matrixExpo = (A, n) => {
   A = copyMatrix(A)
-  if(n == 0) return Identity(A.length) // Identity matrix
-  if(n == 1) return A
+  if (n === 0) return Identity(A.length) // Identity matrix
+  if (n === 1) return A
 
   // Just like Binary exponentiation mentioned in ./BinaryExponentiationIterative.js
   let result = Identity(A.length)
-  while(n > 0) {
-    if(n%2 !== 0) result = matrixMultiply(result, A)
-    n = Math.floor(n/2)
-    if(n > 0) A = matrixMultiply(A, A)
+  while (n > 0) {
+    if (n % 2 !== 0) result = matrixMultiply(result, A)
+    n = Math.floor(n / 2)
+    if (n > 0) A = matrixMultiply(A, A)
   }
   return result
 }
 
 const FibonacciMatrixExpo = (n) => {
   // F(0) = 0, F(1) = 1
   // F(n) = F(n-1) + F(n-2)
-  // Consider below matrix multiplication: 
+  // Consider below matrix multiplication:
 
   // | F(n) |   |1  1|   |F(n-1)|
   // |      | = |    | * |      |
   // |F(n-1)|   |1  0|   |F(n-2)|
 
   // F(n, n-1) = pow(A, n-1) * F(1, 0)
 
-  if(n === 0) return 0;
+  if (n === 0) return 0
 
   const A = [
-              [1, 1],
-              [1, 0]
-            ]
-  const poweredA = matrixExpo(A, n-1) // A raise to the power n
+    [1, 1],
+    [1, 0]
+  ]
+  const poweredA = matrixExpo(A, n - 1) // A raise to the power n
   let F = [
-              [1],
-              [0]
-            ]
+    [1],
+    [0]
+  ]
   F = matrixMultiply(poweredA, F)
   return F[0][0]
 }