[Challenge]: New array method challenge added

challenges/array_methods/5.md

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+# Description
+
+```js
+const Users = [
+  {
+    id: 1,
+    items: [
+      { id: 1, name: "Alice" },
+      { id: 3, name: "Jordan" },
+    ],},
+  {
+    id: 2,
+    items: [
+      { id: 3, name: "Luke" },
+      { id: 4, name: "Christopher" },
+    ],},
+  {
+    id: 3,
+    items: [
+      { id: 5, name: "Tristen" },
+      { id: 2, name: "David" },
+    ],},
+  {
+    id: 4,
+    items: [
+      { id: 1, name: "Abdiel" },
+      { id: 6, name: "Marcus" },
+    ],},
+  {
+    id: 5,
+    items: [
+      { id: 4, name: "Diana" },
+      { id: 3, name: "Jordan" },
+    ],},
+];
+```
+
+Given the above array of objects:
+
+1) Filter out the users based on unique id.
+2) Create a new array output from this array with the id and name.
+3) Array must not contain duplicate ids.
+4) Order doesn't matter
+
+```js
+// const output = [
+//  { id: 1, name: Alice },
+//  { id: 3, name: Jordan },
+//  { id: 4, name: Christopher },
+//  { id: 5, name: Tristen },
+//  { id: 2, name: David },
+//  { id: 6, name: Marcus },
+// ];
+```

solutions/array_methods/5.js

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+const Users = [
+  {
+    id: 1,
+    items: [
+      { id: 1, name: "Alice" },
+      { id: 3, name: "Jordan" },
+    ],},
+  {
+    id: 2,
+    items: [
+      { id: 3, name: "Luke" },
+      { id: 4, name: "Christopher" },
+    ],},
+  {
+    id: 3,
+    items: [
+      { id: 5, name: "Tristen" },
+      { id: 2, name: "David" },
+    ],},
+  {
+    id: 4,
+    items: [
+      { id: 1, name: "Abdiel" },
+      { id: 6, name: "Marcus" },
+    ],},
+  {
+    id: 5,
+    items: [
+      { id: 4, name: "Diana" },
+      { id: 3, name: "Jordan" },
+    ],},
+];
+
+const output = [];
+
+Users.forEach((element)=>{
+  element.items.forEach((user)=>{
+    const index = output.findIndex((res)=>{ return res.id == user.id})
+    if(index < 0){
+      output.push(user)
+    }
+  })
+})
+console.log(output)