Example to show a typesafe way to log values from objects

1-simple-generics.ts

/* given an object of type T,
 * log the value of a property, specified by the argument key
 */
function logValue<T>(obj: T, key: keyof T) {
  console.log(obj[key]);
}

function simpleTest() {
  const Micah = {name: 'Micah'};
  logValue(Micah, "name")
  // The following would be invalid because "age" is not a key of Micah
  // logValue(Micah, "age")
}
/*
 * LOGS
 * Micah
 *
 */
simpleTest();