How do you concatenate several arrays into one?

const sumAll = function (min, max) {
  const allSums = [];
  const initialValue = 0;

  for (let i = min; i <= max; i++) {
    allSums.push([i]);
  }
  console.log(allSums); // 

  let sumTotal = allSums.reduce(function (acc, curr) {
    acc += curr;
    return acc;
  }, initialValue);

  console.log(sumTotal);
};

sumAll(1, 4) returns 01234 instead of 10.

I can see that allSums is 4 arrays inside of an array. How would I go about concatenating them? Thank you for the help!

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