map and return object code example

Example 1: functions in map javascript

const map = new Map();

function foo() {
 return "Hello World!"; 
}

map.set("foo", foo);

console.log(map.get("foo")()); // Output: "Hello World!

Example 2: map a property from array of objects javascript

var result = objArray.map(function(a) {return a.foo;});