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JavaScript JavaScript Array Iteration Methods Combining Array Methods Working with Objects in Arrays

Frank keane
Frank keane
Full Stack JavaScript Techdegree Student 7,990 Points

Why is return necessary here?

Wondering why this code requires return. const usersObj = users.reduce((usersObj, user) => { usersObj[user.name] = user.age; return usersObj; }, {}); console.log(usersObj);

It says in the video that it works ion the first iteration but without the return cant read the second one. Why would it work on the first round?


1 Answer

Ryan Agatep
.a{fill-rule:evenodd;}techdegree seal-36
Ryan Agatep
Full Stack JavaScript Techdegree Graduate 17,693 Points

Hmm. I don’t know exactly why, but my guess is this has something to do with a function that should only have one output. The object instance ‘usersObject’ was only available once during the first iteration. Since the function didn’t return the object instance, it didn’t have anywhere to put ‘Angela’ during the second iteration.