Question

我正在使用Linq.js从数组中的JSON对象获取元素的子集。我有一个JSON对象数组，如下所示：

var result = Enumerable.From(data)  
    .Where("$.price > 2")
    .Select("$.price")  
    .ToArray();

我可以按价格过滤：

AngularJS

但是我必须使用 Linqs.js 过滤并获得红色的所有 ID 。

感谢您的帮助。

Answer 1

使用LINQ：

＆＃13;

var data = [ { "buy": "Buy", "type": "list", "total": 0, "product": [ { "id": "12345", "title": "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.", "description": "Lorem ipsum dolor sit amet, consectetuer...", "price": "9,95", "modelo": [ { "stock": "Y", "color": "red" }, { "stock": "Y", "color": "blue" } ], "Valor": 4.571429, "Comments": 7 }, { "id": "78945", "title": "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.", "description": "Lorem ipsum dolor sit amet, consectetuer...", "price": "7,95", "modelo": [ { "stock": "Y", "color": "green" }, { "stock": "Y", "color": "red" } ], "Valor": 7.345256, "Comments": 12 } ] } ],
    result = Enumerable.From(data[0].product)
        .Where("($.modelo).some(function (x) { return x.color === 'red'; })")
        .OrderBy("$.id")
        .Select("$.id")
        .ToArray();

document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');

＆＃13;

<script src="https://cdnjs.cloudflare.com/ajax/libs/linq.js/2.2.0.2/linq.js"></script>

＆＃13;

或简单的Javascript，包含Array.prototype.filter()，Array.prototype.some()和Array.prototype.map()。

＆＃13;

var data = [ { "buy": "Buy", "type": "list", "total": 0, "product": [ { "id": "12345", "title": "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.", "description": "Lorem ipsum dolor sit amet, consectetuer...", "price": "9,95", "modelo": [ { "stock": "Y", "color": "red" }, { "stock": "Y", "color": "blue" } ], "Valor": 4.571429, "Comments": 7 }, { "id": "78945", "title": "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor.", "description": "Lorem ipsum dolor sit amet, consectetuer...", "price": "7,95", "modelo": [ { "stock": "Y", "color": "green" }, { "stock": "Y", "color": "red" } ], "Valor": 7.345256, "Comments": 12 } ] } ],
    result = data[0].product.filter(function (a) {
        return a.modelo.some(function (b) {
            return b.color === 'red';
        });
    }).map(function (a) { return a.id; });

document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');

＆＃13;

Linq.js得到子项目

1 个答案: