Question

I have an array of objects in javascript. Something similar to this :

    var objectArray = [
         { "Name" : "A", "Id" : "1" },
         { "Name" : "B", "Id" : "2" },
         { "Name" : "C", "Id" : "3" },
         { "Name" : "D", "Id" : "4" }
    ];

Now i am trying to find out whether an object with a given property Name value exist in the array or not through in built function like inArray, indexOf etc. Means if i have only a string C than is this possible to check whether an obejct with property Name C exist in the array or not with using inbuilt functions like indexOf, inArray etc ?

Answer 1

Rather than use index of, similar to the comment linked answer from Rahul Tripathi, I would use a modified version to pull the object by name rather than pass the entire object.

function pluckByName(inArr, name, exists)
{
    for (i = 0; i < inArr.length; i++ )
    {
        if (inArr[i].name == name)
        {
            return (exists === true) ? true : inArr[i];
        }
    }
}

Usage

// Find whether object exists in the array
var a = pluckByName(objectArray, 'A', true);

// Pluck the object from the array
var b = pluckByName(objectArray, 'B');