For, Map and Reduce in Elixir

Section

for i <- 1..10 do
  i * 10
end

1..10
|> Enum.map(fn x -> x * 10 end)

1..10
|> Enum.map(fn x -> x * 10 end)
|> Enum.sum()

1..10
|> Enum.reduce(fn x, accum -> x * 10 + accum end)

1..10
|> Enum.reduce(1, fn x, accum -> x * 10 * accum end)

for i <- 1..3, j <- ["Mexico", "Brasil", "United States"] do
  {:number, i, :country, j}
end

require Integer

for i <- 1..3,
    j <- ["Mexico", "Brasil", "United States"],
    Integer.is_even(i),
    String.starts_with?(j, "M") do
  {:number, i, :country, j}
end