: Flatten

Mergeflatten an array of arrays

I person a JavaScript array similar 6 12 25 25 18 22 10 However would I spell astir merging the abstracted interior arrays into 1 similar 6 12

How do I make a flat list out of a list of lists

I person a database of lists similar 1 2 three four 5 6 7 eight 9 However tin I flatten it to acquire 1 2 three four 5 6 7 eight 9 If your database of lists