C#•14mo ago

A quick question, how do we edit the value of an attribute in an input file?

My prof states that items named, appetizer, entree, and dessert must have values of 0, 1, and 2, when reading the input file, but I am at a loss. I emailed him, but his respond time is crazy long.

51 Replies

Pobiega•14mo ago

What do you mean when you say "an attribute"? Because that word means something very specific in C#

DinnyOP•14mo ago

pause, that's my fault for wrong terminology. i think i am mixing things up i am simply referring to the items in an input file

Pobiega•14mo ago

"the items in an input file"? You mean the lines? "an input file" could mean pretty much anything

DinnyOP•14mo ago

lemme just send a screnshot bc i don't mean the full line

Pobiega•14mo ago

they can be read as a byte array, or an array of strings, or one giant string

DinnyOP•14mo ago

like this for exmaple

DinnyOP•14mo ago

withing the first line, where it says entree he says it must return an integer value in this case a value of 1

Pobiega•14mo ago

can you paste the entire file? in a code block

DinnyOP•14mo ago

yes, please allow me a moment

Entree        28    Pan-Seared Halibut with Sauteed Spinach
Appetizer    9    Thai Green Curry Chicken Wings
Appetizer    10    Char-Grilled Shrimp Skewers
Entree        10    Angus Beef Burger with Aged Cheddar
Dessert        5    Gluten-Free Carrot Cake
Entree        19    Linguine with White Clam Sauce
Entree        23    12-oz Ribeye Steak with Cumin Pepper
Appetizer    4    Chilled Cucumber Soup
Dessert        5    Jam and Peanut Butter Cookie
Appetizer    10    Grilled Artichokes

Entree        28    Pan-Seared Halibut with Sauteed Spinach
Appetizer    9    Thai Green Curry Chicken Wings
Appetizer    10    Char-Grilled Shrimp Skewers
Entree        10    Angus Beef Burger with Aged Cheddar
Dessert        5    Gluten-Free Carrot Cake
Entree        19    Linguine with White Clam Sauce
Entree        23    12-oz Ribeye Steak with Cumin Pepper
Appetizer    4    Chilled Cucumber Soup
Dessert        5    Jam and Peanut Butter Cookie
Appetizer    10    Grilled Artichokes

this is the entire input file appetizer returns value 0, entree returns 1, ans 2 for dessert

Pobiega•14mo ago

ok so its a tab separated CSV Im guessing Entree, Appetizer and Dessert should be an enum

DinnyOP•14mo ago

i honestly didn't even think of that i felt so stuck too okay let me try that first, i'll brb i have a question again so when the stream reader reads the first part of the line, entree in this case, does it automatically read the enum value with it? he only taught us what enums are but never really implimented them, so i am unsure google is not helping much

Pobiega•14mo ago

no of course it doesnt

DinnyOP•14mo ago

i didn't think so

Pobiega•14mo ago

the file contains the string "Entree\t28\tPan-Seared Halibut" the reader is not aware of any enums

DinnyOP•14mo ago

enum aed
{
    Appetizer = 0,
    Entree = 1,
    Dessert = 2,
}

enum aed
{
    Appetizer = 0,
    Entree = 1,
    Dessert = 2,
}

so this is the enum i had created

Pobiega•14mo ago

yup, seems fine, other than the name use PascalCase, and call it something appropriate like DishType

DinnyOP•14mo ago

i can alter it of course, but i just wanted to make sure the structure was proper

Pobiega•14mo ago

yeah the definition is fine

DinnyOP•14mo ago

i have an integer variable named that already so i didn't bc i didn't wanna be confused or to confused my prof well its pascal case so it would be fine one moment

Pobiega•14mo ago

that integer is supposed to map up with your enum, no? like, literally replace it :p

DinnyOP•14mo ago

yes, but that's the thing. I am unsure how to do that because he never truly went over it. like when the reader reads that line and sees "entree" i am unsure how to make have its enum value i watched a youtube videi for better understanding though i don't know how to make that apply to input files

Pobiega•14mo ago

you read it as a string then you parse the string to the correct enum value Enum.TryParse<T> is what you need, assuming you are using modern C#

DinnyOP•14mo ago

DishType dish = Enum.Parse<DishType>(Entree);

DishType dish = Enum.Parse<DishType>(Entree);

something like this ?

Pobiega•14mo ago

so close, yet so far away 😄 Entree would be your variable containing the string value you read from the file

DinnyOP•14mo ago

as long as there's hope i'm still willing to learn lol then would i put the literal value there ? 1 in this case

Pobiega•14mo ago

no you dont put that anywhere your file contains the string "Entree", no?

DinnyOP•14mo ago

yes it does so i leave it blank?

Pobiega•14mo ago

wdym you leave it blank "Entree" will get mapped to DishType.Entree by the parse function

DinnyOP•14mo ago

like after the <DishType> is it just <DishType>()

Pobiega•14mo ago

that has the true value 1

DinnyOP•14mo ago

:000 that makes way more sense then wtf i was saying

Pobiega•14mo ago

yes I agree 😄

DinnyOP•14mo ago

i assumed that there a lot of steps i need to take 😭 that's the way i'm being taught, so ig i just make things unnecessarily difficult u break things down easier

Pobiega•14mo ago

well to be fair, its one of me and one of you

DinnyOP•14mo ago

true

Pobiega•14mo ago

its always harder to teach multiple students

DinnyOP•14mo ago

there's only like 6 ppl total in this class though idk i just wish he would slow down some he moves way too fast and apparently with an outdated teaching style anyways so look at this code then rq

 while (!reader.EndOfStream)
 {

     string[] nextLine = reader.ReadLine().Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
    
     if ( nextLine.Length == 3)
     {
         int dishType = Convert.ToInt32(nextLine[0]);
         

         int dishPrice = Convert.ToInt32(nextLine[1]);
        

         string dishName = nextLine[2];
         
         
     }

 while (!reader.EndOfStream)
 {

     string[] nextLine = reader.ReadLine().Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
    
     if ( nextLine.Length == 3)
     {
         int dishType = Convert.ToInt32(nextLine[0]);
         

         int dishPrice = Convert.ToInt32(nextLine[1]);
        

         string dishName = nextLine[2];
         
         
     }

i did a quick loop thingy ik it's messed up but i have a question so im told we need a while look to read the contents of the input file, yes

Pobiega•14mo ago

I would suggest adding Trim to the string split options btw

DinnyOP•14mo ago

Trim ?

Pobiega•14mo ago

what .NET version are you using?

DinnyOP•14mo ago

one moment, let me see it says .NET 6.0

Pobiega•14mo ago

good

var x = "ost kaka   hello".Split(' ', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries);

var x = "ost kaka   hello".Split(' ', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries);

DinnyOP•14mo ago

okay i can do that, though why would u say trim is better out of curiosity

Pobiega•14mo ago

its not better I use both see?

DinnyOP•14mo ago

oh ok i though u meant get rid of that entirely one moment while i fix it pl

Pobiega•14mo ago

I even posted the code verbatim wth and I said " I suggest adding trim"

DinnyOP•14mo ago

ok so back to my question, in this sense, would i put the enum parse within the while loop ? like while loop only, or inside the if, or none?

Pobiega•14mo ago

seriously?

DinnyOP•14mo ago

sigh nevermind thank for your help thus far, but i will figre it out on my own

Pobiega•14mo ago

Just kinda feels like you have no idea whats going on and just throwing code at the problem when you ask a question like that its like discussing temperatures and basking techniques for cooking, to then ask "yeah so uh do we cook the chiken before or after serving it by the way?" Think of what is available and known * outside the while * inside the while, outside the if * inside the if and the answer should be obvious

DinnyOP•14mo ago

dawg i started this coding class literally last month. i've expressed how much i am struffling, how intense and unreliable my professor is, and how confusing this all is to me. i understand it can be frustrating and one may lose their patience, but alls i ask for is help. I don't need the attitude or remarks. I simply ask for help, not to feel stupid with every question i ask. i feel like i am frustrating you, so i will try and get ahold of my prof again and get out of your hair i will close the post now, i do appreciate the help you've given me thus far though

Gaming

Programming

A quick question, how do we edit the value of an attribute in an input file?