JavaScript concat()

1 개요

JavaScript 배열 concat()

JavaScript

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const array1 = ['a', 'b', 'c'];
const array2 = ['d', 'e', 'f'];
const array3 = array1.concat(array2);
console.log(array3); // ["a", "b", "c", "d", "e", "f"]

▶	["a", "b", "c", "d", "e", "f"]

JavaScript

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const letters = ["a", "b", "c"];
const numbers = [1, 2, 3];
const alphaNumeric = letters.concat(numbers);
console.log(alphaNumeric); // ['a', 'b', 'c', 1, 2, 3]

▶	["a", "b", "c", 1, 2, 3]

JavaScript

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const num1 = [1, 2, 3];
const num2 = [4, 5, 6];
const num3 = [7, 8, 9];
const numbers = num1.concat(num2, num3);
console.log(numbers); // [1, 2, 3, 4, 5, 6, 7, 8, 9]

▶	[1, 2, 3, 4, 5, 6, 7, 8, 9]

JavaScript

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const letters = ["a", "b", "c"];
const alphaNumeric = letters.concat(1, [2, 3]);
console.log(alphaNumeric); // ['a', 'b', 'c', 1, 2, 3]

▶	["a", "b", "c", 1, 2, 3]

2 참고

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/concat