在 javascript 中分组 json 个对象

Question

我想按第一个字母

对 json 数组进行分组

这是我从sqlitedb查询的数据记录

例如：

[
   {"pid":2,"ID":1,"title":"aasas as"},
   {"pid":3,"ID":2,"title":"family"},
   {"pid":4,"ID":3,"title":"fat111"}
]

我需要这个输出

{
    A: [{
        title: "aasas as",
        ID: 1
    }],
    F: [{
        title: "family",
        ID: 2
    }, {
        title: "fat111",
        ID: 3
    }]
}

Answer 1

试试这个

var data = [
   {"pid":2,"ID":1,"title":"aasas as"},
   {"pid":3,"ID":2,"title":"family"},
   {"pid":4,"ID":3,"title":"fat111"}
];

var result = {},
    i, 
    len = data.length,
    key;

for (i = 0; i < len; i++) {
    key = data[i].title.substring(0, 1); // get first word from string
    
    if (!result[key]) { // if key does not exists in result, create it
        result[key] = [];
    }
    
    result[key].push(data[i]); // else push data
}

console.log(result);

在 javascript 中分组 json 个对象

Group json object in javascript

javascript

grouping

json