22 - Mean Mode.js

Ajit24 · Ajit24 · commit 700b8408d561 · 2022-09-15T12:42:07.000+05:30
diff --git a/22 - Mean Mode.js b/22 - Mean Mode.js
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+// Step By Step
+function MeanMode (arr) {
+    // First, we declare an empty object to hold the number of times each item in the input array occurs,
+    var modeMap = {};
+    // a variable to hold the actual mode,
+    var mode = 0;
+    // a variable to hold the number of times the mode occurs,
+    var modeCount = 0;
+    // and a variable to hold the sum of the items in the array (to calculate the mean),
+    var sum = 0;
+  
+    // Next, we loop through each item in the input array and...
+    for (var i = 0; i < arr.length; i++) {
+      // ...add each value to our sum variable
+      sum += arr[i];
+  
+      // ...check if each value is present in our frequency count
+      if (modeMap[arr[i]]) {
+        // If it is, we increase its value by 1.
+        modeMap[arr[i]]++;
+      } else {
+        // If it isn't, we initialize its value to 1.
+        modeMap[arr[i]] = 1;
+      }
+  
+      // ...and check if the count is greater than our current mode's count.
+      if (modeMap[arr[i]] > modeCount) {
+        // If it is, we set the mode to the current item in our input array...
+        mode = arr[i];
+        // ...and set the number of times the mode has occured to the current item's value in our mode array.
+        modeCount = modeMap[arr[i]];
+      }
+    }
+  
+    // Next, we calculate the mean by dividing the sum by the total number of items in the array.
+    var mean = sum / arr.length;
+  
+    // If the mean and the mode are the same, we return 1, otherwise we return 0.
+    if (mean === mode) {
+      return 1;
+    } else {
+      return 0;
+    }
+  }
+  
+  // Without Comments
+  function MeanMode (arr) {
+    var modeMap = {};
+    var mode = 0;
+    var modeCount = 0;
+    var sum = 0;
+  
+    for (var i = 0; i < arr.length; i++) {
+      sum += arr[i];
+  
+      if (modeMap[arr[i]]) {
+        modeMap[arr[i]]++;
+      } else {
+        modeMap[arr[i]] = 1;
+      }
+      if (modeMap[arr[i]] > modeCount) {
+        mode = arr[i];
+        modeCount = modeMap[arr[i]];
+      }
+    }
+  
+    var mean = sum / arr.length;
+  
+    if (mean === mode) {
+      return 1;
+    } else {
+      return 0;
+    }
+  }
