添加数组中不存在的品牌

function addBrandIfNotExists(brandsArray, newBrand) {
    // 检查数组中是否已存在该品牌
    if (!brandsArray.includes(newBrand)) {
        // 如果不存在，则添加到数组中
        brandsArray.push(newBrand);
    }
    return brandsArray;
}

// 示例使用
let brands = ['Apple', 'Samsung', 'Microsoft'];
let newBrand = 'Google';

// 添加品牌
brands = addBrandIfNotExists(brands, newBrand);

console.log(brands); // 输出: ['Apple', 'Samsung', 'Microsoft', 'Google']

let brandsSet = new Set(['Apple', 'Samsung', 'Microsoft']);
let newBrand = 'Google';

// 添加品牌
brandsSet.add(newBrand);

console.log(Array.from(brandsSet)); // 输出: ['Apple', 'Samsung', 'Microsoft', 'Google']