JavaScript 展平对象数组的数组 [英] JavaScript flattening an array of arrays of objects

问题描述

我有一个数组，其中包含多个数组，每个数组包含多个对象，与此类似.

I have an array which contains several arrays, each containing several objects, similar to this.

[[object1, object2],[object1],[object1,object2,object3]]

这是记录到控制台的对象的屏幕截图.

Here is a screenhot of the object logged to the console.

将其展平以使其仅包含一组对象的最佳方法是什么?

What would be the best approach to flattening this out so it just an array of objects?

我试过了，但没有运气:

I've tried this with no luck:

console.log(searchData);  
  var m = [].concat.apply([],searchData);    
console.log(m);

searchData 注销了上面的截图，但是 m 注销了 [ ]

searchData logs out the screenshot above, but m logs out [ ]

这里是searchData的实际内容:

Here is the actual contents of searchData:

[[{"_id":"55064111d06b96d974937a6f","title":"Generic Title","shortname":"generic-title","contents":"<p>The Healing Center offers practical, social, and spiritual support to individuals and families. Services include, but are not limited to: food and clothing, job skills training and job search assistance, auto repair (Saturdays only), mentoring, financial counseling, tutoring, prayer, life skills training, and helpful information about local community services.</p><p>Stay in touch with us:</p>","__v":0},{"_id":"5508e1405c621d4aad2d2969","title":"test english","shortname":"test-page","contents":"<h2>English Test</h2>","__v":0}],[{"_id":"550b336f33a326aaee84f883","shortname":"ok-url","title":"now english","contents":"<p>okokko</p>","category":"Transportation","__v":0}]]

推荐答案

您可以使用 Array.concat 如下所示:-

You can use Array.concat like bellow:-

var arr = [['object1', 'object2'],['object1'],['object1','object2','object3']];
var flattened = [].concat.apply([],arr);

flattened 将是您预期的数组.

ES 2020 提供了 flat，也flatMap 如果你想迭代，到平面列表列表:

ES 2020 gives the flat, also flatMap if you want to iterate over, to flat lists of lists:

[['object1'], ['object2']].flat() // ['object1', 'object2']

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