function greet(name) {

    function displayName() {

        console.log('Hi' + ' ' + name);

    }

​

    // returning a function

    return displayName;

}

​

const g1 = greet('John');

console.log(g1); // returns the function definition

g1(); // calling the function

 {/* short-circuit evaluation.  */}

                                        {chartKey !== 'weather_summary' && (

                                            <ChartWrapper

                                                chartTitle={filteredData[chartKey].chart_title}

                                                chartType={filteredData[chartKey].chart_type}

                                                chartData={filteredData[chartKey].values}

                                            />

                                        )}