javascript merge multidimensional array

const array1 = ['a', 'b', 'c'];
const array2 = ['d', 'e', 'f'];
const array3 = [...array1, ...array2];

console.log(array3);
// expected output: Array ["a", "b", "c", "d", "e", "f"]

3.29
7
Garrick 75 points

                                    const _questions = _.map(this.sections, section => section.questions);
const questions  = Array.prototype.concat.apply([], _questions);

3.29 (7 Votes)
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