function flattenArray(array) { let result = []; array.forEach(element => { if (Array.isArray(element)) { // ์ฌ๊ท ํธ์ถ๋ก ์ค์ฒฉ๋ ๋ฐฐ์ด์ ์ฒ๋ฆฌ result = result.concat(flattenArray(element)); } else { // ๋ฐฐ์ด์ด ์๋๋ฉด ๊ฒฐ๊ณผ ๋ฐฐ์ด์ ์ถ๊ฐ result.push(element); } }); return result;}// ์ฌ์ฉ ์์ let nestedArray = [1, [2, 3], [4, [5, 6]]];let flatArray = flat..