C#•2y ago

❔ ✅ Return

How do I return a dictionary

56 Replies

Human bob = new Human("Bob", 18);
Human bobby = new Human("Bobby", 16);
Human bibby = new Human("Bibby", 11);

Console.WriteLine(Human.objectCount);
Console.WriteLine();
Console.ReadLine();

class Human
{
    private string name { get; set; }
    private int age { get; set; }
    public static int objectCount;

    static Dictionary<string, int> nameAndAge = new Dictionary<string, int>();

    public Human(string name, int age)
    {

        this.name = name;
        this.age = age;
        objectCount++;

        Console.WriteLine($"{this.name}'s age is {this.age} and he has connected.");

        nameAndAge.Add(name, age);

    }

    public Dictionary getNameAndAge() // the error is here, how do i return a dictionary via a function?
    { //
        return nameAndAge; //
    } //



}

Human bob = new Human("Bob", 18);
Human bobby = new Human("Bobby", 16);
Human bibby = new Human("Bibby", 11);

Console.WriteLine(Human.objectCount);
Console.WriteLine();
Console.ReadLine();

class Human
{
    private string name { get; set; }
    private int age { get; set; }
    public static int objectCount;

    static Dictionary<string, int> nameAndAge = new Dictionary<string, int>();

    public Human(string name, int age)
    {

        this.name = name;
        this.age = age;
        objectCount++;

        Console.WriteLine($"{this.name}'s age is {this.age} and he has connected.");

        nameAndAge.Add(name, age);

    }

    public Dictionary getNameAndAge() // the error is here, how do i return a dictionary via a function?
    { //
        return nameAndAge; //
    } //



}

Hazel 🌊💃•2y ago

Dictionary requires two type parameters. Dictionary<TKey, TValue>.

احمدOP•2y ago

public Dictionary<string, int> getNameAndAge() { return nameAndAge; } like that? the key is a string and the value is an int

Hazel 🌊💃•2y ago

🙂

احمدOP•2y ago

but how do i get the whole list because i can only call it via the object not the class if i make it static? but i got this

System.Func`1[System.Collections.Generic.Dictionary`2[System.String,System.Int32]]

System.Func`1[System.Collections.Generic.Dictionary`2[System.String,System.Int32]]

Hazel 🌊💃•2y ago

That looks like you tried something like this:

MODiX•2y ago

Ahmed

REPL Result: Success

Human bob = new Human("Bob", 18);
Human bobby = new Human("Bobby", 16);
Human bibby = new Human("Bibby", 11);

Console.WriteLine(Human.objectCount);
Console.WriteLine(Human.getNameAndAge);
Console.ReadLine();

class Human
{
    private string name { get; set; }
    private int age { get; set; }
    public static int objectCount;

    static Dictionary<string, int> nameAndAge = new Dictionary<string, int>();

    public Human(string name, int age)
    {

        this.name = name;
        this.age = age;
        objectCount++;

        Console.WriteLine($"{this.name}'s age is {this.age} and he has connected.");

        nameAndAge.Add(name, age);

    }

    public static Dictionary<string, int> getNameAndAge()
    {
        return nameAndAge;
    }

}

Human bob = new Human("Bob", 18);
Human bobby = new Human("Bobby", 16);
Human bibby = new Human("Bibby", 11);

Console.WriteLine(Human.objectCount);
Console.WriteLine(Human.getNameAndAge);
Console.ReadLine();

class Human
{
    private string name { get; set; }
    private int age { get; set; }
    public static int objectCount;

    static Dictionary<string, int> nameAndAge = new Dictionary<string, int>();

    public Human(string name, int age)
    {

        this.name = name;
        this.age = age;
        objectCount++;

        Console.WriteLine($"{this.name}'s age is {this.age} and he has connected.");

        nameAndAge.Add(name, age);

    }

    public static Dictionary<string, int> getNameAndAge()
    {
        return nameAndAge;
    }

}

Console Output

Bob's age is 18 and he has connected.
Bobby's age is 16 and he has connected.
Bibby's age is 11 and he has connected.
3
System.Func`1[System.Collections.Generic.Dictionary`2[System.String,System.Int32]]

Bob's age is 18 and he has connected.
Bobby's age is 16 and he has connected.
Bibby's age is 11 and he has connected.
3
System.Func`1[System.Collections.Generic.Dictionary`2[System.String,System.Int32]]

Compile: 765.760ms | Execution: 122.947ms | React with ❌ to remove this embed.

Hazel 🌊💃•2y ago

Console.WriteLine(bob.getNameAndAge)

Console.WriteLine(bob.getNameAndAge)

احمدOP•2y ago

nope

Hazel 🌊💃•2y ago

Console.WriteLine(Human.getNameAndAge);

احمدOP•2y ago

Human.getNameAndAge yep

Hazel 🌊💃•2y ago

That's practically exactly what you did. Human.getNameAndAge is a method, so you need to invoke it like one:

Human.getNameAndAge()

Human.getNameAndAge()

احمدOP•2y ago

Console.WriteLine(Human.getNameAndAge());

Console.WriteLine(Human.getNameAndAge());

? i tried same thing

MODiX•2y ago

Ahmed

REPL Result: Success

Human bob = new Human("Bob", 18);
Human bobby = new Human("Bobby", 16);
Human bibby = new Human("Bibby", 11);

Console.WriteLine(Human.objectCount);
Console.WriteLine(Human.getNameAndAge());
Console.ReadLine();

class Human
{
    private string name { get; set; }
    private int age { get; set; }
    public static int objectCount;

    static Dictionary<string, int> nameAndAge = new Dictionary<string, int>();

    public Human(string name, int age)
    {

        this.name = name;
        this.age = age;
        objectCount++;

        Console.WriteLine($"{this.name}'s age is {this.age} and he has connected.");

        nameAndAge.Add(name, age);

    }

    public static Dictionary<string, int> getNameAndAge()
    {
        return nameAndAge;
    }

}

Human bob = new Human("Bob", 18);
Human bobby = new Human("Bobby", 16);
Human bibby = new Human("Bibby", 11);

Console.WriteLine(Human.objectCount);
Console.WriteLine(Human.getNameAndAge());
Console.ReadLine();

class Human
{
    private string name { get; set; }
    private int age { get; set; }
    public static int objectCount;

    static Dictionary<string, int> nameAndAge = new Dictionary<string, int>();

    public Human(string name, int age)
    {

        this.name = name;
        this.age = age;
        objectCount++;

        Console.WriteLine($"{this.name}'s age is {this.age} and he has connected.");

        nameAndAge.Add(name, age);

    }

    public static Dictionary<string, int> getNameAndAge()
    {
        return nameAndAge;
    }

}

Console Output

Bob's age is 18 and he has connected.
Bobby's age is 16 and he has connected.
Bibby's age is 11 and he has connected.
3
System.Collections.Generic.Dictionary`2[System.String,System.Int32]

Bob's age is 18 and he has connected.
Bobby's age is 16 and he has connected.
Bibby's age is 11 and he has connected.
3
System.Collections.Generic.Dictionary`2[System.String,System.Int32]

Compile: 770.151ms | Execution: 121.414ms | React with ❌ to remove this embed.

Hazel 🌊💃•2y ago

It's not the same thing It's different

احمدOP•2y ago

oh ye i see

Hazel 🌊💃•2y ago

Look closely:

System.Func`1[System.Collections.Generic.Dictionary`2[System.String,System.Int32]]
System.Collections.Generic.Dictionary`2[System.String,System.Int32]

System.Func`1[System.Collections.Generic.Dictionary`2[System.String,System.Int32]]
System.Collections.Generic.Dictionary`2[System.String,System.Int32]

احمدOP•2y ago

i saw

Hazel 🌊💃•2y ago

You're getting closer

احمدOP•2y ago

yeah

Hazel 🌊💃•2y ago

So, I imagine what you want is to print all names and ages

احمدOP•2y ago

ye in dictionary form {key, value, ... }

Hazel 🌊💃•2y ago

You need to iterate over the elements and print each one like:

Console.WriteLine($"{item.Key}: {item.Value}");

Console.WriteLine($"{item.Key}: {item.Value}");

احمدOP•2y ago

hmm i'd need to iterate a certain number of times too so i got a question dict = {key, value [0] key,value [1] } does the first pair count as 0

Hazel 🌊💃•2y ago

https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/statements/iteration-statements

Iteration statements -for, foreach, do, and while - C#

C# iteration statements (for, foreach, do, and while) repeatedly execute a block of code. You use those statements to create loops or iterate through a collection.

Hazel 🌊💃•2y ago

C# is a zero-based language, yes. Your snippet doesn't make much sense though.

احمدOP•2y ago

look

Human bob = new Human("Bob", 18);
Human bobby = new Human("Bobby", 16);
Human bibby = new Human("Bibby", 11);

Console.WriteLine(Human.objectCount);


int length_of_objectCount = Human.objectCount;
for (int iterator = 0; iterator > length_of_objectCount; iterator++)
{
    Console.WriteLine(Human.nameAndAge);
}


Console.ReadLine();

class Human
{
    private string name { get; set; }
    private int age { get; set; }
    public static int objectCount;

    static Dictionary<string, int> nameAndAge = new Dictionary<string, int>();

    public Human(string name, int age)
    {

        this.name = name;
        this.age = age;
        objectCount++;

        Console.WriteLine($"{this.name}'s age is {this.age} and he has connected.");

        nameAndAge.Add(name, age);

    }

    public static Dictionary<string, int> getNameAndAge()
    {
        return nameAndAge;
    }

}

Human bob = new Human("Bob", 18);
Human bobby = new Human("Bobby", 16);
Human bibby = new Human("Bibby", 11);

Console.WriteLine(Human.objectCount);


int length_of_objectCount = Human.objectCount;
for (int iterator = 0; iterator > length_of_objectCount; iterator++)
{
    Console.WriteLine(Human.nameAndAge);
}


Console.ReadLine();

class Human
{
    private string name { get; set; }
    private int age { get; set; }
    public static int objectCount;

    static Dictionary<string, int> nameAndAge = new Dictionary<string, int>();

    public Human(string name, int age)
    {

        this.name = name;
        this.age = age;
        objectCount++;

        Console.WriteLine($"{this.name}'s age is {this.age} and he has connected.");

        nameAndAge.Add(name, age);

    }

    public static Dictionary<string, int> getNameAndAge()
    {
        return nameAndAge;
    }

}

this is the snippet im referring to

int length_of_objectCount = Human.objectCount;
for (int iterator = 0; iterator > length_of_objectCount; iterator++)
{
    Console.WriteLine(Human.nameAndAge);
}

int length_of_objectCount = Human.objectCount;
for (int iterator = 0; iterator > length_of_objectCount; iterator++)
{
    Console.WriteLine(Human.nameAndAge);
}

@The Dark Realm's No. 2 - Hazel

احمدOP•2y ago

Hazel 🌊💃•2y ago

Try using foreach instead. for will work, but foreach is really all that's needed here.

احمدOP•2y ago

it's working with the for how would you do it?

Hazel 🌊💃•2y ago

I'll tell you once you have a working version in the thread 🙂 Giving you what I would do won't help you learn 😄

Angius•2y ago

The dictionary has string as the key, you can't use numbers from 0 up to get items from it this way

احمدOP•2y ago

it's for the index of the pair key = 0, value = 1 and it's iterating over the pairs

Hazel 🌊💃•2y ago

It's not though When you access the dictionary like that it expects the key, not an index.

احمدOP•2y ago

not yet

Hazel 🌊💃•2y ago

I highly recommend trying to use foreach instead.

MODiX•2y ago

Angius

REPL Result: Success

var dictr = new Dictionary<string, int>(){
    ["twelve"] = 12,
    ["eleven"] = 11,
};

dictr["twelve"]

var dictr = new Dictionary<string, int>(){
    ["twelve"] = 12,
    ["eleven"] = 11,
};

dictr["twelve"]

Result: int

Compile: 515.941ms | Execution: 40.232ms | React with ❌ to remove this embed.

Angius•2y ago

This is how you retrieve values from a dictionary But, yes, if you wanted both keys and values, you would use a foreach

Hazel 🌊💃•2y ago

You can technically iterate over the keys using an index IIRC

احمدOP•2y ago

ima leave this code here n switch to foreach

int length_of_objectCount = Human.objectCount;
Dictionary<string, int> list_for_nameAndAge = Human.nameAndAge;
for (int iterator = 0; iterator > length_of_objectCount; iterator++)
{
    string key = list_for_nameAndAge[KeyValuePair];
    int value = 
}

int length_of_objectCount = Human.objectCount;
Dictionary<string, int> list_for_nameAndAge = Human.nameAndAge;
for (int iterator = 0; iterator > length_of_objectCount; iterator++)
{
    string key = list_for_nameAndAge[KeyValuePair];
    int value = 
}

Hazel 🌊💃•2y ago

Best way to learn 🙂

احمدOP•2y ago

how do i use foreach what arguments does it take

MODiX•2y ago

Angius

REPL Result: Success

foreach (char letter in "word")
{
    Console.WriteLine($"The letter is '{letter}'");
}

foreach (char letter in "word")
{
    Console.WriteLine($"The letter is '{letter}'");
}

Console Output

The letter is 'w'
The letter is 'o'
The letter is 'r'
The letter is 'd'

The letter is 'w'
The letter is 'o'
The letter is 'r'
The letter is 'd'

Compile: 612.394ms | Execution: 91.784ms | React with ❌ to remove this embed.

احمدOP•2y ago

int length_of_objectCount = Human.objectCount;
Dictionary<string, int> list_for_nameAndAge = Human.nameAndAge;
foreach (var pair in list_for_nameAndAge)
{
    Console.WriteLine(pair.Key, pair.Value);
}

int length_of_objectCount = Human.objectCount;
Dictionary<string, int> list_for_nameAndAge = Human.nameAndAge;
foreach (var pair in list_for_nameAndAge)
{
    Console.WriteLine(pair.Key, pair.Value);
}

Angius•2y ago

$tias

MODiX•2y ago

https://images-ext-1.discordapp.net/external/CO2vsU2aXbRqYy1RdewOYnkBq1nGFBjdbjlNgjvG67A/https/media.discordapp.net/attachments/364492811489509376/964064233035816990/unknown.png?width=543&height=257

احمدOP•2y ago

it's only showing the key

Angius•2y ago

Trial and error, the basis of all science, including computer science lol

احمدOP•2y ago

not the value int length_of_objectCount = Human.objectCount; Dictionary<string, int> list_for_nameAndAge = Human.nameAndAge; foreach (var pair in list_for_nameAndAge) { Console.WriteLine(pair.Key + pair.Value); } i fixed it how do you get it to appear like {key, value ... } in that format

Angius•2y ago

$"{{{pair.Key}, {pair.Value}}}" should do the trick

احمدOP•2y ago

you gotta do it by hand? 💀

Angius•2y ago

Well, you could serialize the dictionary to JSON and print it all if you wanted to Otherwise, yes

احمدOP•2y ago

nvm ye thank you okay i got the hang of it thank you :)))

Hazel 🌊💃•2y ago

I supplied a link to documentation that goes over it.

احمدOP•2y ago

@The Dark Realm's No. 2 - Hazel u 2 thank you 🙂 i understand now thank you again !close

Accord•2y ago

Closed! Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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