added iFit questions

Author: DevDelvo

codetests/iFit.js

@@ -0,0 +1,34 @@
+function tripleThreat(a) {
+  for (const i = 0; i < a.length - 2; i++) {
+    if ((a[i] + 1 === a[i + 1]) && (a[i + 1] + 1 === a[i + 2])) return 1;
+  }
+  return 0;
+}
+
+console.log(tripleThreat([0, 4, 5, 6, 10, 12])) // 1
+
+
+
+// We need to deliver a package of cookies bags.  You will be given an inventory of small bags (1 kilo each) and big bags
+// (5 kilos each) along with the goal amount of kilos we need to ship the customer.  Return the amount of small bags the package
+// will contain assuming we always use big bags first.  Return -1 if it cannot be done.
+// Input
+// small (type: int) - The number of small bags we have to work with
+// big (type: int) - The number of big bags we have to work with
+// goal (type: int) - The goal weight of the package that we need to ship out
+// Output
+// In of how many small bags to use, if there isn't enough return -1.
+
+
+function createPackage(small, big, goal) {
+  while (goal >= 5 && big > 0) {
+    goal -= 5;
+    big--;
+  }
+  if (goal > small) {
+    return -1;
+  }
+  return goal;
+}
+
+console.log(createPackage(9, 2, 9)); // 4