使用lodash按属性连接对象数组

Question

Is there a way using lodash or another library to join an array of objects?

I'm looking for a readymade function not a for loop.

For example:

[{a: 1}, {a:3}, {a: 4}]
      //Run a function by specifing the property a and setting "," as the delimeter
Get 1,3,4

Answer 1

Here is your lodash answer

var arr = [{a: 1}, {a:3}, {a: 4}];
var s = _.map(arr, 'a').join(',');
//s == '1,2,3,4'

Answer 2

You don't need lodash for this, you can just use map and join :

 let collection = [{a: 1}, {a:3}, {a: 4}]; alert(collection.map(item => item.a).join(','));