A.Vector.repeat

You're seeing just the function repeat, go back to A.Vector module for more information.
Link to this function

repeat(generator_fun, n)

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Populates a vector of size n by calling generator_fun repeatedly.

Examples

# Although not necessary, let's seed the random algorithm
iex> :rand.seed(:exrop, {1, 2, 3})
iex> A.Vector.repeat(&:rand.uniform/0, 3)
vec([0.7498295129076106, 0.06161655489244533, 0.7924073127680873])