How to filter out an array of objects on a basis of a given param?

Question

I have this array:

[
  {
    "prod": {
      "a": "b",
      "mdh": "nui";
    },
    "prod_merchant": {
      "prod_delivery": "Express",
      "site": 45
    }
  },
  {
    "prod": {
      "a": "b",
      "mdh": "nui";
    },
    "prod_merchant": {
      "prod_delivery": "Scheduled",
      "site": 45
    }
  },
]

My code:

let prod_delivery = req.param('prod_delivery');
console.log(prod_delivery) // Express
GlobalServices.isDisabledAddToCart(filteredProductList, filters)
    .then(function(updatedProductList) //Under updatedProductList that whole array is coming
        {
            var output = updatedProductList.filter(function(x) {
                return x.prod_merchant.prod_delivery == prod_delivery.prod_delivery
            });

            console.log("output", output)
        }

Output: output []

Basically, I want to get all the product details on the basis of prod_delivery from the array.

In the array I have mentioned the value of prod_delivery , which is prod_delivery: "Express" or prod_delivery: "Scheduled" — Neha Kumari
– Neha Kumari, Commented Aug 8, 2021 at 12:07
I'm taking about let prod_delivery = req.param('prod_delivery'); — Ayush Gupta
– Ayush Gupta, Commented Aug 8, 2021 at 12:07
So if prod_delivery is a string, then prod_delivery.prod_delivery is undefined. No wonder you get an empty array. — trincot
– trincot, Commented Aug 8, 2021 at 12:12
Replace x.prod_merchant.prod_delivery == prod_delivery.prod_delivery with x.prod_merchant.prod_delivery == prod_delivery. That should do it. — Ayush Gupta
– Ayush Gupta, Commented Aug 8, 2021 at 12:15

chrwahl · Accepted Answer · 2021-08-08 12:32:07Z

2

You can use filter for that:

var products = [{
    "prod": {
      "a": "b",
      "mdh": "nui"
    },
    "prod_merchant": {
      "prod_delivery": "Express",
      "site": 45
    }
  },
  {
    "prod": {
      "a": "b",
      "mdh": "nui"
    },
    "prod_merchant": {
      "prod_delivery": "Scheduled",
      "site": 45
    }
  }
];

var prod_express = products.filter(product => product.prod_merchant.prod_delivery == 'Express');

console.log(prod_express);

answered Aug 8, 2021 at 12:32

chrwahl

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2 Comments

Peter Seliger Over a year ago

Maybe with this answer one considers providing a case insensitive search/filter approach in order to solve the true/real issue the OP was experiencing (express vs Express). After all the OP's filter method was/is implemented correctly for case sensitivity / value equality.

chrwahl Over a year ago

@PeterSeliger I can see that from the comments, but I think that was more a bug then af feature. In any case OP could compare the lower case strings, like: product.prod_merchant.prod_delivery.toLowerCase() == 'Express'.toLowerCase()

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