02_deep_foundations_coercion_resolved.js

function isValidName(name) {
  if (
    typeof name == "string" &&
    name.trim().length >= 3
  ) {
    return true;
  }

  return false;
}

function hoursAttended(attended,length) {
  if (
    typeof attended == "string" &&
    attended.trim() != ""
  ) {
    attended = Number(attended);
  }
  if (
    typeof length == "string" &&
    length.trim() != ""
  ) {
    length = Number(length);
  }
  if (
    typeof attended == "number" &&
    typeof length == "number" &&
    attended <= length &&
    attended >= 0 &&
    length >= 0 &&
    Number.isInteger(attended) &&
    Number.isInteger(length)
  ) {
    return true;
  }

  return false;
}


// tests:
console.log(isValidName("Frank") === true);
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(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);
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);