Lodash如何将对象数组转换为一个对象

Question

Example from this:

[
    {"name":"tony", "age":14},
    {"name":"jacky", "age":23},
    {"name":"lucy", "age":34},
    {"name":"sam", "age":15},
    {"name":"jay", "age":31}
]

to:

{
    "tony": [],
    "jacky": [],
    "lucy": [],
    "sam": [],
    "jay": []
}

Answer 1

There is no need to use Lodash . Array.prototype.reduce() will do the job.

 const data = [ {"name":"tony", "age":14}, {"name":"jacky", "age":23}, {"name":"lucy", "age":34}, {"name":"sam", "age":15}, {"name":"jay", "age":31} ]; const result = data.reduce((acc, curr) => { acc[curr.name] = []; return acc; }, {}); console.log(result); 

Answer 2

Try with Array#forEach function .

 var arr =[ {"name":"tony", "age":14}, {"name":"jacky", "age":23}, {"name":"lucy", "age":34}, {"name":"sam", "age":15}, {"name":"jay", "age":31} ] var obj={} arr.forEach(function(a){ obj[a.name]=[] }) console.log(obj) 

Or simple do with Array#reduce

 var arr =[ {"name":"tony", "age":14}, {"name":"jacky", "age":23}, {"name":"lucy", "age":34}, {"name":"sam", "age":15}, {"name":"jay", "age":31} ] var res = arr.reduce((a,b) => (a[b.name]=[] ,a),{}) console.log(res) 

Answer 3

如果您不想使用for或reduce ，那么这是一个单点划线

_(data).keyBy('name').mapValues(() => []).value()