JavaScript Road Trip Part 3 Level 1 Challenge 5

[ArshiS]

I have a problem in interpreting the question,
read statement 1 which is,
1.Inside the fearMessage function expression, use conditional statements (e.g., if, else if) to check the integer value of the fear variable, assigned on line 1, and decide whether its value is LOW or MEDIUM.

And came up with code,

var fearMessage = function(fear) {
if (fear<200)
{return "LOW";
}
else if (fear>=200 && fear <=300)
{return "MEDIUM";
}

};

read statement 2, which is this,
2. For each fear range below we want to display a confirmation message with the corresponding message. We can return a call to the confirm function that has a single string argument containing the correct message.

and came up with code,

function confirmToGo(fearMessage)
{ if(fearMessage=="LOW")
alert("Fear Level: LOW \n Still wanna ride?");
else
alert("Fear Level: "+fearMessage+ "'\n Still wanna ride?");
}

Kindly guide me and tell me how is this wrong.
Thanks.

[steve1]

I must admit, this is frustrating. Not because I'm new to development, but because some of the directions/instructions are just bad.

For example:
"Note: You do not need to change the existing code that’s provided for you in the challenge editor."

Really? So don't edit the code functions? Obviously modification is needed or there wouldn't be any point. But...

[fariahasin]

Hi,

function confirmRide(confirmToGo) {
return confirmToGo();
}

what is happening in those lines?

again, can you please explain this line? -

var startRide = confirmRide (fearMessage);

it's a value insertion on a variable. but what i am confused about is, confirmRide function previously had 'confirmToGo' parameters inside. why is it replaced with 'fearMessage' ?

[sakshi1823]

What is wrong with my code! Please let me know, I have been wasting time trying to find the error, however its identical to the solution posted here. Can somebody please help!

var fear = fearGenerated(numPeeps, rainInInches, numSharks);

var fearMessage = function() {
if(fear<200){
alert("Fear Level: LOW \n Still wanna ride?");
}
else if(fear>=200 && fear<=300)
{
alert("Fear Level: MEDIUM \n Think you'll make it?");}
};
function confirmRide(confirmToGo) {
return confirmToGo();
}
var startRide = confirmRide(fearMessage);

[snychka]

@sakshi1823 at a glance, it looks like you have some spaces surrounding your newlines. See if that helps out!

@fariahasin

confirmRide function previously had 'confirmToGo' parameters inside. why is it replaced with 'fearMessage' ?

Can you elaborate on that, on the "previously" bit in particular? Sorry, not following.

To try and answer, though

function confirmRide(confirmToGo) {
  return confirmToGo();
}

confirmRide is intended to be given a function as an parameter. That function is confirmToGo, and it is called, and its return value returned to the caller of confirmRide.

[sakshi1823]

Still showing an error:

var fear = fearGenerated(numPeeps, rainInInches, numSharks);

var fearMessage = function() {
if(fear<200){
alert("Fear Level: LOW\nStill wanna ride?");
}
else if(fear>=200 && fear<=300)
{
alert("Fear Level: MEDIUM\nThink you'll make it?");}
};
function confirmRide(confirmToGo) {
return confirmToGo();
}
var startRide = confirmRide(fearMessage);

[snychka]

Hey! I checked more closely, and ran it, and we missed one key thing.

You need to use confirm

So change your alerts to confirms, and make sure to return them too!

You can check out the solution at the top of this thread, too, and so you're not stuck, use the ☰ button to skip over a challenge in the course while you're waiting for some help!

[growlocally]

I'm curious as to why we have to pass a function into another function to call it. Why don't we just call the function itself? For example, why not just do this:

var startRide = fearMessage();

---

moderator: as there were no timely replies, I'll just include this as a modification. In this case, confirmRide is not needed in terms of achieving the same result. It's only required for practice with the mechanism, so for learning purposes.

[nperlmutter]

The wording was pretty confusing with this problem. I had little issue conceptualizing the solution, but I was confused as to what it was telling me about the confirm messages. I couldn't decipher if I was supposed to be creating variables to tie to the values of "LOW" and "MEDIUM", like in one of the generator problems. In that problem, you tied a generator to "ON" or "OFF". I think this question might benefit from explicitly stating that both conditions will have their own confirm method. I don't think that would interrupt the difficult, because that was the only thing I genuinely struggled with. Maybe that's a personal thing, related to individual perception, but I thought it was worth addressing.

---

moderator: Maybe, and thanks for sharing. The instructions in this challenge are more intended to explain what needs to be done, not so much in this particular part of the challenge how to do it. Note, for example

var fearMessage = function() {
  var message;
  if (fear < 200) {
    message = "Fear Level: LOW\nStill wanna ride?";
  } else if (fear >= 200 && fear <= 300) {
    message = "Fear Level: MEDIUM\nThink you'll make it?";
  }
  return confirm(message);
};

would be accepted here, too.

[samibirnbaum]

I have just read through the whole forum and i know this has been touched on before but i'm still not understanding it...

i would really appreciate if someone could explain this to me simply

why do we need to use return before the confirm?

here is my code....

`var fear = fearGenerated(numPeeps, rainInInches, numSharks);

var fearMessage = function() {
if(fear < 200){
confirm("Fear Level: LOW"/n"Still wanna ride?");
}else if(fear >= 200 && <= 300){
confirm("Fear Level: MEDIUM"/n"Think you'll make it?");
}
};

function confirmRide(confirmToGo) {
return confirmToGo();
}

var startRide = confirmRide(fearMessage);`

[snychka]

why do we need to use return before the confirm?

Hello! Can you explain more what you mean by "before the confirm"? I don't quite understand, and with that clarification we should be able to better help out!

[samibirnbaum]

`var fear = fearGenerated(numPeeps, rainInInches, numSharks);

var fearMessage = function() {
if(fear < 200){
RETURN confirm("Fear Level: LOW"/n"Still wanna ride?");
}else if(fear >= 200 && <= 300){
RETURN confirm("Fear Level: MEDIUM"/n"Think you'll make it?");
}
};

function confirmRide(confirmToGo) {
return confirmToGo();
}

var startRide = confirmRide(fearMessage);`

see the code above which is the solution to the problem, why do those RETURNS need to be there?
surely since you are using the built-in function of confirm the fear message will be displayed when called upon without the need for return confirm in the code

[samibirnbaum]

furthermore, in the next challenge we are told not to use the return before an alert!

var modifiedNames = [ "Thomas Meeks",
"Gregg Pollack",
"Christine Wong",
"Dan McGaw" ];

modifiedNames.map (function (arrayCell){
RETURN alert("Yo, " + arrayCell + "!");
});

this triggered an
Incorrect Submission
You don't need a return statement in your solution.

[snychka]

Hi, and thanks for the clarification!

The two return statements in fearMessage return the return value of confirm.

You don't need or want it with alert, as it was no (substantive) return value.

Let me know if you have any other questions!

[samibirnbaum]

Still a bit confused..

surely the confirm() and alert() both have the same value

the value being a "string"...

im not sure what you mean by return value?

thank you for helping me get to bottom of this as i learn through all the stuff and new terminology!

[snychka]

Sure!

Here's some code that explains that:

• snippent snippet

We'll start there, and please ask if you have further question!

[nysteve]

Had a bit of a struggle because I misunderstood the question at first; was trying to use the prompt instead of confirm, but in doing so I got an error of 'prompt' is undefined. Now while obviously prompt should have not been used in this project, prompt is a valid JS function. I suggest a clearer error messages.

[jlopezfdez]

As some people says in this forum, it is true that the source code could be reduced to get the same final result.

But remember that the title of the lesson is 'Functions as Parameters, Arguments and Return Values', so the source code is showing an example of these three possibilities:

Function as Parameter (in bold):

function confirmRide(confirmToGo) {
return confirmToGo();
}

Function as Argument (in bold):

var startRide = confirmRide(fearMessage);

Function as Return Value (in bold):

function confirmRide(confirmToGo) {
return confirmToGo();
}