reduce

reduce(array, initial, reducer)

Reduces array to a single value by executing the reducer function on each element, starting with the initial accumulator value.

data-first

reduce([1, 2, 3, 4], 0, (acc, x) => acc + x); // 10

data-last

pipe(
    [1, 2, 3, 4],
    reduce(0, (acc, x) => acc + x),
); // 10