Convert JSON to array without key

Question

I have a query to return a column from the database which gets return the following result:

[
{
    "tenantName": "H&M"
},
{
    "tenantName": "McDonalds"
}
]

However, I want to use the result to create an array that only has the names: ["H&M", "McDonalds"]

Answer 1

you can use map together with Object.values and flat

• map(i => Object.values(i)) - it creates array of arrays //[['HM'], ['McDons']]
• flat will create one level array

const input = [
{
    "tenantName": "H&M"
},
{
    "tenantName": "McDonalds"
}
];

const result = input.map(i => Object.values(i)).flat()
console.log(result)

if you know that one item(object) of array always will have key tenantName then you can use only map

    const input = [
    {
        "tenantName": "H&M"
    },
    {
        "tenantName": "McDonalds"
    }
    ];

    const result = input.map(i => i.tenantName)
    console.log(result)

Answer 2

You can use map

const tenantArray = [ { "tenantName": "H&M" }, { "tenantName": "McDonalds" }].map(tenant => tenant.tenantName)

Answer 3

Array.prototype.map() works well for this.

var data = [
      {
        tenantName: "H&M",
      },
      {
        tenantName: "McDonalds",
      },
    ];


    function filterJSON(json){
    return json.map(i => i.tenantName);
    }

    console.log(filterJSON(data));