Concatenate a readable stream's data into a single array.
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var toArray =
Returns all the data objects in an array. This is useful for streams in object mode if you want to just use an array.
var stream =
stream is not defined, it is assumed that
this is a stream.
var stream =streamtoArray = toArraystream
callback is not defined, then it returns a promise.
If you want to return a buffer, just use