npm install react-bind-decorator --save

import reactbind from 'react-bind-decorator';

@reactbind()
class Foo extends React.Component {

    // This gets called with the correct <this>
    boundMethod(arg, i) {
        return <li key={i}>{this.props.test + arg}</li>;
    }

    // Not bound
    componentDidMount() {

    }

    // Not bound
    render() {
        return (
            <div>
                { this.props.data.map(this.boundMethod) }
            </div>
        );
    }
}