lodash从中删除对象 [英] lodash remove object from

问题描述

我有这样的JSON响应:

I have a JSON response like this:

{ 
  id_order: '123123asdasd',
  products: [ 
    { 
      description: 'Product 1 description',
      comments: [
        { 
          id_comment: 1,
          text: 'comment1'
        },
        { 
          id_comment: 2,
          text: 'comment2'
        }
      ] 
    }
  ]
}

如何使用 lodash 删除一个具有 id_comment 的对象例如等于1?

How can I remove, with lodash, one object which has an id_comment that is equal to 1, for example?

尝试使用 _ .. remove 失败.

https://jsfiddle.net/baumannzone/o9yuLuLy/

推荐答案

您可以使用 _.remove 在forEach中使用一个对象作为谓词:

You can use _.remove inside an forEach using an object as the predicate:

_.forEach(obj.products, function(product) {
  _.remove(product.comments, {id_comment: 1});
});

如果为谓词提供了一个对象，则创建的_.matches样式回调对于具有给定对象属性的元素返回true，否则返回false.

If an object is provided for predicate the created _.matches style callback returns true for elements that have the properties of the given object, else false.

---

var obj = {
  id_order: '123123asdasd',
  products: [{
    description: 'Product 1 description',
    comments: [{
      id_comment: 1,
      text: 'comment1'
    }, {
      id_comment: 2,
      text: 'comment2'
    }]
  }, {
    description: 'Product 2 description',
    comments: [{
      id_comment: 2,
      text: 'comment2'
    }, {
      id_comment: 3,
      text: 'comment3'
    }]
  }, {
    description: 'Product 3 description',
    comments: [{
      id_comment: 1,
      text: 'comment1'
    }, {
      id_comment: 2,
      text: 'comment2'
    }]
  }]
};

_.forEach(obj.products, function(product) {
  _.remove(product.comments, {id_comment: 1});
});

document.getElementById('result').innerHTML = JSON.stringify(obj, null, 2);

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.10.1/lodash.min.js"></script>
<pre id="result"></pre>

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