How to map an array of objects in React

Question

I have an array of objects. I would like to map this array of objects. I know how to match an array, but I can't figure out how to match an array of objects. Here is what I have done so far:

An array of objects that I want to display:

const theData = [
    {
        name: 'Sam',
        email: '[e-mail]'
    },

    {
        name: 'Ash',
        email: '[e-mail]'
    }
]

My component:

class ContactData extends Component {
    render() {
        //works for array
        const renData = this.props.dataA.map((data, idx) => {
            return <p key={idx}>{data}</p>
        });

        //doesn't work for array of objects
        const renObjData = this.props.data.map(function(data, idx) {
            return <p key={idx}>{data}</p>
        });

        return (
            <div>
                //works
                {rennData}
                <p>object</p>
                //doesn't work
                {renObjData}
            </div>
        )
    }
}


ContactData.PropTypes = {
    data: PropTypes.arrayOf(
        PropTypes.obj
    ),
    dataA: PropTypes.array
}

ContactData.defaultProps = {
    data: theData,
    dataA: dataArray
}

What am I missing?

Answer 1

What you need to map an array of objects and remember that each element will be an object, so you will use, for example, dot notation to take the values ​​of the object.

In your component

 [
    {
        name: 'Sam',
        email: '[e-mail]'
    },

    {
        name: 'Ash',
        email: '[e-mail]'
    }
].map((anObjectMapped, index) => {
    return (
        <p key={`${anObjectMapped.name}_{anObjectMapped.email}`}>
            {anObjectMapped.name} - {anObjectMapped.email}
        </p>
    );
})

, jsx, , , .

jsx

Answer 2

, :

const renObjData = this.props.data.map(function(data, idx) {
    return <p key={idx}>{data.name}</p>;
});

:

const renObjData = this.props.data.map(function(data, idx) {
   return ([
       <p key={idx}>{data.name}</p>,
       <p key={idx}>{data.email}</p>,
   ]);
});

Answer 3

try the following snippet

const renObjData = this.props.data.map(function(data, idx) {
    return <ul key={idx}>{$.map(data,(val,ind) => {
        return (<li>{val}</li>);
    }
    }</ul>;
});

Answer 4

@FurkanO provided the right approach. Although for a cleaner approach (es6 way) you can do something like this

[{
    name: 'Sam',
    email: '[e-mail]'
 },
 {
    name: 'Ash',
    email: '[e-mail]'
 }
].map( ( {name, email} ) => {
    return <p key={email}>{name} - {email}</p>
})

Hooray!