I used the map here to loop over the watchList array and get some values for the ratings array in the callback function when I did not insert return before the object it shows an error why is that
const ratings = watchList.map((film) => {
{title: film.Title, rating: film.imdbRating}
})
challenge link
I’m not sure what exactly you mean.
A map takes a callback function. The input to that callback function is an old array element. The return value of the callback function will be the new array value.
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Ok I edited the post and explained my problem
A function has no return value unless you return something. And the map has no idea what to put into the new array unless you return something.
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Ok I understand
aren’t we sometimes gonna use map without inserting return at all
Nope. There should always be a return value. Sometimes the return statement is implicit instead of explicit, but a map callback should always have a return value.
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what implicit return means in the map array method does it mean not having curly braces that wraps the body of the function
Yeah
input => "This is an implicit return for " + input
Vs
input => {
return "This is an explicit return for " + input;
}
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