find bad data

Author: devvsakib

L-B/0008 countBadData( L-B )/README.md

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+# 0008 countBadData( L-B )
+
+## Problem
+
+Write a function that returns the number of bad data in an array.
+
+## Test Cases
+
+- countBadData([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]); // 0
+- countBadData([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, "L-B"]); // 1
+- countBadData([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, "L-B", "L-B"]); // 2
+- countBadData([1, 2, 3, 4, 5, 6, 7, -8, 9, -10, "L-B", "L-B"]); // 4
+
+## Solution
+
+```javascript
+function countBadData(data) {
+    let count = 0;
+    for (const ele of data) {
+        if (typeof ele !== "number") {
+            count++;
+        }
+    }
+    return count;
+}
+
+const dataInput = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, "L-B", "L-B"];
+const badData = countBadData(dataInput);
+```
+
+
+## How it works
+
+- The function takes an array as a parameter.
+- It creates a variable called count and assigns it a value of 0.
+- It creates a for loop that iterates through the array.
+- It checks if the element is not a number.
+- If it is not a number, it increments the count variable by 1.
+- It returns the value of count.
+
+## References
+
+- [Wikipedia](https://en.wikipedia.org/wiki/Increment_and_decrement_operators)
+- [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof)
+
+## Problem Added By
+
+- [GitHub](https://www.github.com/devvsakib)
+- [LinkedIn](https://www.linkedin.com/in/devvsakib)
+- [Twitter](https://twitter.com/devvsakib)
+
+## Contributing
+
+Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
+
+Please make sure to update tests as appropriate.

L-B/0008 countBadData( L-B )/countBadData.js

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+// function findingBadData(arr) {
+    // let badData = 0;
+    // const err = "Given input must be Array";
+
+    // if (Array.isArray(arr)) {
+    //     for (let i = 0; i < arr.length; i++) {
+    //         if (arr[i] < 0) {
+    //             badData++;
+    //         }
+    //     }
+    //     return badData;
+    // }
+    // return err;
+// }
+function countBadData(data) {
+    let count = 0;
+    for (const ele of data) {
+        if (typeof ele !== "number" || ele < 0) {
+            count++;
+        }
+    }
+    return count;
+}
+
+const dataInput = [1, 2, 3, 4, -5, 6, 7, 8, 9, -10, "L-B", "L-B"];
+const badData = countBadData(dataInput);
+console.log(badData);