如何在javascript中按值获取数据

Question

我的Json数据有问题，我的Json数据就像那样。

[
    {
        "category": "A",
        "subcategory": "a",
        "channel": "http://localhost/stream"
    },
    {
        "category": "A",
        "subcategory": "b",
        "channel": "http://localhost/stream"
    },
    {
        "category": "B",
        "subcategory": "c",
        "channel": "http://localhost/stream"
    },
    {
        "category": "B",
        "subcategory": "d",
        "channel": "http://localhost/stream"
    }
]

如何按类别名称排序以显示子类别。如何按类别获取数据

Answer 1

如果我已正确理解，您希望按类别分组：

var d = {}
// Group elems by category
for (var i = 0; i < data.length; i++) {
    var category = data[i]["category"];

    if (!(category in d)) {
        d[category] = [];
    }
    d[category].push(data[i]);
}

// Retrieve elements by category
d['A'] // [{"category": "A", ...}, {"category": "B", ...}]