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let fruits = ["apples", "bananas"];
let vegetables = ["corn", "carrots"];
let produce = [fruits, vegetables];
//["apples","bananas","corn","carrots"]
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const letters = ['a', 'b', 'c'];
const numbers = [1, 2, 3];
const newArray = letters.concat(numbers);
// newArrat is ['a', 'b', 'c', 1, 2, 3]