STOP using IF and SWITCH statements

// Code paste for the YouTube video https://youtube.com/shorts/O5YK_cYHaqI?feature=share

// Run each snippet separately, as the 'constant' `personsName`
// or function ageFor will error if redeclared
// ###########################################################

const personsName = "Sara";

if (personsName === "Dave") {
  console.log("Their age is 23.");
} else if (personsName === "Sara") {
  console.log("Their age is 27.");
} else if (personsName === "Jake") {
  console.log("Their age is 34.");
} else if (personsName === "Ruth") {
  console.log("Their age is 52.");
} else if (personsName === "Paul") {
  console.log("Their age is 41.");
} else if (personsName === "Rose") {
  console.log("Their age is 73.");
} else {
  console.log("Person not found.");
}

// Console prints "Their age is 27."

// ===========================================================

const personsName = "Sara";

switch (personsName) {
  case "Dave":
    console.log("Their age is 23.");
    break;
  case "Sara":
    console.log("Their age is 27.");
    break;
  case "Jake":
    console.log("Their age is 34.");
    break;
  case "Ruth":
    console.log("Their age is 52.");
    break;
  case "Paul":
    console.log("Their age is 41.");
    break;
  case "Rose":
    console.log("Their age is 73.");
    break;
  default:
    console.log("Person not found.");
}

// Console prints "Their age is 27."

// ===========================================================

function ageFor(personsName) {
  return {
    Dave: () => console.log("Their age is 23."),
    Sara: () => console.log("Their age is 27."),
    Jake: () => console.log("Their age is 34."),
    Ruth: () => console.log("Their age is 52."),
    Paul: () => console.log("Their age is 41."),
    Rose: () => console.log("Their age is 73."),
  }[personsName] ?? (
    () => console.log("Person not found.")
  );
}

ageFor("Sara")();

// Console prints "Their age is 27."

// ===========================================================

const ageFor = (personsName) => (
  {
    Dave: () => console.log("Their age is 23."),
    Sara: () => console.log("Their age is 27."),
    Jake: () => console.log("Their age is 34."),
    Ruth: () => console.log("Their age is 52."),
    Paul: () => console.log("Their age is 41."),
    Rose: () => console.log("Their age is 73."),
  }[personsName] ?? (
    () => console.log("Person not found.")
  )
);

ageFor("Sara")();

// Console prints "Their age is 27."

// ===========================================================

const personsName = "Sara";

((personsName) =>
  ({
    Dave: () => console.log("Their age is 23."),
    Sara: () => console.log("Their age is 27."),
    Jake: () => console.log("Their age is 34."),
    Ruth: () => console.log("Their age is 52."),
    Paul: () => console.log("Their age is 41."),
    Rose: () => console.log("Their age is 73."),
  }[personsName] ?? (
    () => console.log("Person not found.")
  ))
)(personsName)();

// Console prints "Their age is 27."