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The convertRequestList function takes an array of requests as an argument and returns an array of friend requests. Here's how the function works: Initialize an empty array friendRequests to store the friend requests. Use a nested for loop to iterate over the requestList array. The outer loop (for (let i = 0; i < requestList.length; i )) loops through each element of the requestList array. For each iteration, it sets the value of senderId to the userId property of the current element. The inner loop (for (let j = i 1; j < requestList.length; j )) loops through the rest of the elements of the requestList array, starting from the next element after the current element. For each iteration, it sets the value of receiverId to the userId property of the current inner loop element. For each pair of senderId and receiverId, a new FriendRequest object is created using new FriendRequest({ senderId, receiverId }), and it is pushed to the friendRequests array using friendRequests.push(...). Finally, the friendRequests array is returned from the function. This function can be used to create multiple friend requests at once, for example, when a user imports a list of friends from another service.