completed the rest of the tasks for Sprint 1

Author: KKtech06

Sprint-1/implement/dedupe.js

@@ -1 +1,13 @@
-function dedupe() {}
+function dedupe(array) {
+  let seen = new Set();
+  let result = [];
+    for (let item of array) {
+        if (!seen.has(item)) {
+            seen.add(item);
+            result.push(item);
+        }
+    }
+    return result;
+}
+
+module.exports = dedupe;

Sprint-1/implement/max.js

@@ -1,4 +1,12 @@
-function findMax(elements) {
+function findMax(elements){
+    let max = -Infinity;
+   for (let i = 0; i < elements.length; i++) {
+     if (typeof elements[i] === "number")
+       if (elements[i] > max) {
+         max = elements[i];
+       }
+   }
+    return max;
 }
 
 module.exports = findMax;

Sprint-1/implement/sum.js

@@ -1,4 +1,14 @@
-function sum(elements) {
+function sum(elements)
+{    let sum = 0;
+    for (let i = 0; i < elements.length; i++) {
+        if (typeof elements[i] === "number"){
+            sum += elements[i];
+        }
+    }
+    
+    return sum;
 }
 
+
+
 module.exports = sum;

Sprint-1/refactor/includes.js

@@ -1,12 +1,11 @@
 // Refactor the implementation of includes to use a for...of loop
 
 function includes(list, target) {
-  for (let index = 0; index < list.length; index++) {
-    const element = list[index];
-    if (element === target) {
-      return true;
+    for (const element of list) {
+        if (element === target) {
+            return true;
+        }
     }
-  }
   return false;
 }