Что является эквивалентом C# PHP's “сам::”?

Question

Что является эквивалентом C# PHP's “сам::”?

Я думаю, что это то, что вы хотите

cookie_ids=Cookie.objects.filter(board__pk=self.kwargs['pk']).values_list('id',flat=True)

sugar_ids=Sugar.objects.filter(board__pk=self.kwargs['pk']).values_list('id',Ôflat=True)

ids_list = list(cookie_ids) + list(sugar_ids)
context['total_actions'] = Action.objects.filter(target_id__in=ids_list)

9

c# oop

задан Edward Tanguay 13 May 2009 в 12:03

5 ответов

If you're calling the method from inside the class, you don't need to specify anything like ::Self, just the method name will do.

class Customer
{
    public string FirstName { get; set; }
    public string LastName { get; set; }

    public static Customer GetCurrentCustomer()
    {
        if (DatabaseConnectionExists())
        {
            return new Customer { FirstName = "Jim", LastName = "Smith" };
        }
        else
        {
            throw new Exception("Database connection does not exist.");
        }
    }

    public static bool DatabaseConnectionExists()
    {
        return true;
    }
}

13

ответ дан 4 December 2019 в 06:49

Just leave it out. DatabaseConnectionExists is defined inside the class.

4

ответ дан 4 December 2019 в 06:49

Just call it without any prefix.

2

ответ дан 4 December 2019 в 06:49

No, there isn´t. But with the refactor tools, changing a name of a class should not worry you too much.

0

ответ дан 4 December 2019 в 06:49

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score 15 · Accepted Answer

There's no real equivalent - you have to either specify the class name, i.e.

Customer.DatabaseConnectionExists()

or miss out the qualifier altogether, i.e.

DatabaseConnectionExists()

The latter style of calling is advisable since it's simpler and doesn't lose any meaning. Also, it's more inline with method calling in instances (i.e. calling by InstanceMethod() and not this.InstanceMethod(), which is overly verbose).