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spread operator in this case
can someone help me understand what the spread operator does in this case? [...arr, ...innerMovies]
Steven Parker210,867 Points
What the spread operator itself does is to convert a collection of items into its individual elements. In your example, "
arr" is an array with potentially several elements; and "
...arr" is the elements all listed out as separate items.
This lets you do things in one step that would otherwise require loops, such as your example of re-combining multiple arrays into a single one.