使用lodash .groupBy。如何为分组输出添加自己的密钥? [英] using lodash .groupBy. how to add your own keys for grouped output?
问题描述
我从API返回此示例数据。
I have this sample data returned from an API.
我正在使用Lodash的 _。groupBy
来将数据转换为我可以更好地使用的对象。
返回的原始数据是:
I'm using Lodash's _.groupBy
to convert the data into an object I can use better.
The raw data returned is this:
[
{
"name": "jim",
"color": "blue",
"age": "22"
},
{
"name": "Sam",
"color": "blue",
"age": "33"
},
{
"name": "eddie",
"color": "green",
"age": "77"
}
]
我希望 _.groupBy
函数返回一个如下所示的对象:
I want the _.groupBy
function to return an object that looks like this:
[
{
color: "blue",
users: [
{
"name": "jim",
"color": "blue",
"age": "22"
},
{
"name": "Sam",
"color": "blue",
"age": "33"
}
]
},
{
color: "green",
users: [
{
"name": "eddie",
"color": "green",
"age": "77"
}
]
}
]
目前我正在使用
_.groupBy(a, function(b) { return b.color})
返回此信息。
{blue: [{..}], green: [{...}]}
分组是正确的,但我真的想添加我想要的键(颜色
,用户
)。这可能是使用 _。groupBy
?或其他一些 LoDash
实用程序?
the groupings are correct, but I'd really like to add the keys I want (color
, users
). is this possible using _.groupBy
? or some other LoDash
utility?
推荐答案
你可以这样做
var result = _.chain(data)
.groupBy("color")
.pairs()
.map(function(currentItem) {
return _.object(_.zip(["color", "users"], currentItem));
})
.value();
console.log(result);
注意: Lodash 4.0起, .pairs
功能已经已重命名为 _。toPairs()
Note: Lodash 4.0 onwards, the .pairs
function has been renamed to _.toPairs()
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