JavaScript 数组索引数组？

Question

我想知道如何检查这一点。示例:

var products = [
    {
        title: 'Product 1',
        categories: ['One', 'Two', 'Three']
    },
    {
        title: 'Product 2',
        categories: ['Three', 'Four']
    }
];

var categories = ['Two','Four'];

如何获得与某一类别匹配的两种产品？希望有人能帮助我:)

Answer 1

纯js:

products.filter(function(product) {
  return categories.some(function(cat) {
     return product.categories.indexOf(cat) >= 0;
  });
});

洛达什:

_.filter(products, function(product) {
  return _.some(categories, function(cat) {
     return _.indexOf(product.categories, cat) >= 0;
  });
});