Questions tagged [nested-object]

Objects are composite data types which are built from primitives and other objects. An object’s building blocks are commonly referred to as its "fields" or "properties" comprising of key -> value pairs.

A nested object is basically a data structure where an object refers to other objects, i.e. an object's values is another object or another set of objects.

A nested object structure can be accessed by chaining dot notations or bracket notations. For example, in the following, if we want to access the first a property from nestedObject1:

obj = {
    a: "1",
    nestedObject1: [{
        a: "2",
    }, {
        a: "3",
    }]
};

Using dot notation, we can access that property like this:

obj.nestedObject1[0].a

//will return the value "2" of the first property `a` from nestedObject1

Using bracket notation, we can access that property like this:

obj["nestedObject1"][0]["a"]

//will return the value "2" of the first property `a` from nestedObject1