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Setting value to enum


By : mada0304
Date : August 02 2020, 01:00 AM
this one helps.
I want to assign "paramControlHeight" which is inside my enum a different value. So, for example, it starts out as 40, but I would like to change it to 80 later on
code :
struct face
{   int paramControlHeight = 40;
    int paramLabelWidth    = 80;
    int paramSliderWidth   = 300;
};

face f;                     // create instance
f.paramControlHeight = 40;  // modify member
struct face
{   
    static const int paramControlHeight = 40;
    static const int paramLabelWidth    = 80;
    static const int paramSliderWidth   = 300;
};
enum face
{   paramControlHeight = 40,
    paramLabelWidth    = 80,
    paramSliderWidth   = 300
};
face f{ paramControlHeight };   // create instance of face
f = paramSliderWidth;           // assign a different value to it
enum face_parts {
    nose = 1,
    eye = 2,
    mouth = 3
};
void print_face_part( face_parts fp ){
    if (fp == nose) std::cout << "nose";
    if (fp == eye) std::cout << "eye";
    if (fp == mouth) std::cout << "mouth";
}


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Setting an enum by using an int specific to that enum?


By : Jakob91
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Enums have a built-in ID number, the "ordinal," that you can use for this purpose, as long as you have an easy way to get from the number that represents a given value in the database to the ordinal of the enum. Ordinals are assigned to enum values in the order they are declared in the source file, starting from 0, so in your example, SUNDAY would have an ordinal of 0, MONDAY of 1, etc.
In order to use this, you just have to convert the integer stored in the database to its corresponding ordinal, and then use it to access the enum value. So for your example, an implementation might be
code :
private static Day[] values = Day.values();
public static Day getDay(int i) {
    return values[i - 1];
}

Using spinner and ArrayAdapter with Enum, setting the spinner text to an enum property


By : Ravi Anthony
Date : March 29 2020, 07:55 AM
To fix this issue Can't you just override the toString() method on your enum and return whatever value you would like to use as the display value.

Setting a Substate enum based on a State enum


By : Malik Hall
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , You can use an abstract class which represents the subcategory. It'll get the category in its Ctor and will maintain a static map between a category and a list of subcategory items.
The SubcategoryItem can hold all the functionality (if any) you'd need from any single subcategory item.
code :
public class SubcategoryItem
{
    public string Name { get; set; }
    public Action WhatItDoes { get; set; }

    public SubcategoryItem(string name, Action trick)
    {
        Name = name;
        WhatItDoes = trick;
    }
}

public abstract class AbsSubcategory
{
    private static readonly IDictionary<Category, IList<SubcategoryItem>> mCategoriesMap = new Dictionary<Category, IList<SubcategoryItem>>();

    public abstract IList<SubcategoryItem> Subcategories { get; }

    protected AbsSubcategory(Category cat)
    {
        if (Subcategories != null) mCategoriesMap[cat] = Subcategories;
    }
}

public class VehiclesSubcategory : AbsSubcategory
{
    private static readonly IList<SubcategoryItem> mSubcategories;
    public override IList<SubcategoryItem> Subcategories
    {
        get { return mSubcategories; }
    }

    static VehiclesSubcategory()
    {
        mSubcategories = new List<SubcategoryItem>()
        {
            new SubcategoryItem("Bikes", () => { /* Do something */ } ),
            new SubcategoryItem("Cars", () => { /* Do something */ } ),
        };
    }

    public VehiclesSubcategory()
        : base(Category.Vehicles)
    {
    }
}

How to get numeric value of an enum, or setting an enum with numeric value, in Objective C?


By : Derek Lewinson
Date : March 29 2020, 07:55 AM
To fix this issue I think you write the wrong code to create cell. Please update your code like as below and see output
code :
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    if ([indexPath row] == [[self imgGallery] count]) { // show the camera icon
        UICollectionViewCell * cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"new" forIndexPath:indexPath];

        if (cell == nil) {
            /*
             cell
             - contentView
             - button
             - camera icon
             */

            cell = [[UICollectionViewCell alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
        }
        UIImageView * imgCameraIcon = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"camera.png"]];
        [imgCameraIcon setFrame:CGRectMake(0, 0, 50, 50)];
        [imgCameraIcon setContentMode:UIViewContentModeScaleAspectFit];

        UIButton * btnCamera = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
        [btnCamera addSubview:btnCamera];
        [btnCamera addTarget:self action:@selector(openCameraTapped) forControlEvents:UIControlEventTouchUpInside];
        [imgCameraIcon setCenter:CGPointMake([btnCamera width] / 2, [btnCamera height] / 2)];

        [cell addSubview:btnCamera];
        [cell setBackgroundColor:[UIColor whiteColor]];
        [collectionView registerClass:[cell class] forCellWithReuseIdentifier:@"new"];

        return cell;
    }
    else {
        UICollectionViewCell * cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"review" forIndexPath:indexPath];
        if (cell == nil) {
            /*
             cell
             - contentView
             - button
             - image selected
             */

            cell = [[UICollectionViewCell alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
        }
        UIImageView * imgSelected = [[UIImageView alloc] initWithImage:[[self imgGallery] objectAtIndex:[indexPath row]]];
        [imgSelected setFrame:CGRectMake(0, 0, 100, 100)];
        [imgSelected setContentMode:UIViewContentModeScaleAspectFill];
        [imgSelected setTag:1];

        UIButton * btnCamera = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
        [btnCamera addSubview:btnCamera];
        [btnCamera addTarget:self action:@selector(imageTapped) forControlEvents:UIControlEventTouchUpInside];
        [imgSelected setCenter:CGPointMake([btnCamera width] / 2, [btnCamera height] / 2)];

        [cell addSubview:btnCamera];
        [collectionView registerClass:[cell class] forCellWithReuseIdentifier:@"review"];
        return cell;
    }
}

Setting enum member of class gives invalid use of ‘enum'


By : Afonasev Eugene
Date : March 29 2020, 07:55 AM
I wish this help you , Change
code :
enum b {C,D};
enum {C,D} b; 
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