feat: plusMinus problem solved

Author: wakidurrahman

src/hackerrank/problem-solving/algorithms-004-010.js

@@ -15,7 +15,7 @@ function aVeryBigSum(ar) {
   return sum;
 }
 
-// 004:
+// 004: Diagonal Difference
 
 function diagonalDifference(arr) {
   const lengthOfArray = arr.length; // Length of the array
@@ -46,3 +46,32 @@ const myArray = [
   [4, 5, 6, 7],
 ];
 diagonalDifference(myArray);
+
+// 005: Given an array of integers, calculate the ratios of its elements that are positive, negative, and zero. Print the decimal value of each fraction on a new line with  places after the decimal.
+/*
+ * Complete the 'plusMinus' function below.
+ *
+ * The function accepts INTEGER_ARRAY arr as parameter.
+ */
+
+function plusMinus(arr) {
+  const arrLength = arr.length;
+  let positiveCount = 0;
+  let negativeCount = 0;
+  let zeroCount = 0;
+  for (let i = 0; i < arrLength; i++) {
+    if (arr[i] === 0) {
+      zeroCount += 1;
+    } else if (arr[i] > 0) {
+      positiveCount += 1;
+    } else if (arr[i] < 0) {
+      negativeCount += 1;
+    }
+  }
+  const calculatePos = (positiveCount / arrLength).toFixed(6);
+  const calculateNeg = (negativeCount / arrLength).toFixed(6);
+  const calculateZero = (zeroCount / arrLength).toFixed(6);
+  console.log(calculatePos + '\n' + calculateNeg + '\n' + calculateZero);
+}
+arrayOfIntegers = [-4, 3, -9, 0, 4, 1];
+plusMinus(arrayOfIntegers);