02_deep_foundations_coercion.js.js

function hoursAttended(x , y) {
  if (Number(x) && Number(y))
    return (x > -1 && y > -1) && (x % 1 === 0 && y % 1 === 0) && (Number(x) < Number(y));

  return false;
}

function isValidName(value) {
  return typeof value === 'string' && !(value == 0) && String(value).length > 3;
}

// tests
console.log(isValidName("Frank") === true);
console.log(isValidName(false) === false);
console.log(isValidName(null) === false);
console.log(isValidName(undefined) === false);
console.log(isValidName("") === false);
console.log(isValidName("  \t\n") === false);
console.log(isValidName("X") === false);

// tests:
console.log(hoursAttended(6,10) === true);
console.log(hoursAttended(6,"10") === true);
console.log(hoursAttended("6",10) === true);
console.log(hoursAttended("6","10") === true);
console.log(hoursAttended("",6) === false);
console.log(hoursAttended(6,"") === false);
console.log(hoursAttended("","") === false);
console.log(hoursAttended("foo",6) === false);
console.log(hoursAttended(6,"foo") === false);
console.log(hoursAttended("foo","bar") === false);
console.log(hoursAttended(null,null) === false);
console.log(hoursAttended(null,undefined) === false);
console.log(hoursAttended(undefined,null) === false);
console.log(hoursAttended(undefined,undefined) === false);
console.log(hoursAttended(false,false) === false);
console.log(hoursAttended(false,true) === false);
console.log(hoursAttended(true,false) === false);
console.log(hoursAttended(true,true) === false);
console.log(hoursAttended(10,6) === false);
console.log(hoursAttended(10,"6") === false);
console.log(hoursAttended("10",6) === false);
console.log(hoursAttended("10","6") === false);
console.log(hoursAttended(6,10.1) === false);
console.log(hoursAttended(6.1,10) === false);
console.log(hoursAttended(6,"10.1") === false);
console.log(hoursAttended("6.1",10) === false);
console.log(hoursAttended("6.1","10.1") === false);