lodash 从

Question

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'
        }
      ] 
    }
  ]
}

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

Tried using _.remove without success.

Solution

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

Answer 1

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

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

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>

Answer 2

removeObject: function(collection,property, value){

     return   _.reject(collection, function(item){

        return item[property] === value;
    })
},

Answer 3

Here's an example using remove() :

_.each(order.products, function (product) {
    _.remove(product.comments, function (comment) {
        return comment.id_comment === 1;
    });
});

Assuming your order variable is named order , and the products and comments properties are always present.