w3 exercises

w3_1_arrays/objects.js

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+/**
+ * typedef {{name:string, age:number, job:string}} Person
+ *
+ */
+const persons = [
+  { name: 'John', age: 30, job: 'Developer' },
+  { name: 'Mary', age: 25, job: 'Designer' },
+  { name: 'Peter', age: 27, job: 'Developer' },
+  { name: 'Jane', age: 22, job: 'Designer' },
+  { name: 'Bob', age: 33, job: 'Developer' },
+  { name: 'Alice', age: 35, job: 'Manager' },
+  { name: 'Tim', age: 32, job: 'Designer' },
+  { name: 'Sara', age: 21, job: 'Designer' },
+  { name: 'Tom', age: 34, job: 'Developer' },
+  { name: 'Alex', age: 24, job: 'Manager' },
+  { name: 'John', age: 30, job: 'Manager' },
+  { name: 'Mary', age: 25, job: 'Designer' },
+  { name: 'Peter', age: 27, job: 'Developer' },
+  { name: 'Jane', age: 22, job: 'Designer' },
+  { name: 'Bob', age: 33, job: 'Developer' },
+  { name: 'Alice', age: 35, job: 'Manager' },
+  { name: 'Tim', age: 32, job: 'Designer' },
+  { name: 'Sara', age: 21, job: 'Designer' },
+  { name: 'Tom', age: 34, job: 'Developer' },
+  { name: 'Alex', age: 24, job: 'Developer' },
+];
+
+/**
+ * averageAge.
+ *
+ * @param {Person[]} persons
+ */
+function averageAge(persons) {
+  // placehlder
+}
+
+console.log('Average age:', averageAge(persons));
+
+/**
+ * listJobs.
+ *
+ * @param {Person[]} persons
+ */
+function listJobs(persons) {
+  // placehlder
+}
+
+console.log('List of jobs:', listJobs(persons));