创建N个对象并将它们添加到列表中 [英] Creating N objects and adding them to a list

问题描述

我有一个方法，它接受N个对象(我要创建的对象数)，并且需要返回N个对象的列表.

I have a method which takes in N, the number of objects I want to create, and I need to return a list of N objects.

目前，我可以通过一个简单的循环来做到这一点:

Currently I can do this with a simple loop:

    private static IEnumerable<MyObj> Create(int count, string foo)
    {
        var myList = new List<MyObj>();

        for (var i = 0; i < count; i++)
        {
            myList .Add(new MyObj
                {
                    bar = foo
                });
        }

        return myList;
    }

我想知道是否还有另一种方法，也许可以使用LINQ来创建此列表.

And I'm wondering if there is another way, maybe with LINQ to create this list.

我尝试过:

    private static IEnumerable<MyObj> CreatePaxPriceTypes(int count, string foo)
    {
        var myList = new List<MyObj>(count);

        return myList.Select(x => x = new MyObj
            {
                bar = foo
            });

    }

但这似乎确实填充了我的列表.

But this does seem to populate my list.

我尝试将选择更改为foreach，但处理相同.

I tried changing the select to a foreach but its the same deal.

我意识到该列表具有容量个计数，而LINQ找不到要迭代的任何元素.

I realized that the list has the capacity of count and LINQ is not finding any elements to iterate.

        myList.ForEach(x => x = new MyObj
        {
            bar = foo
        });

是否有正确的LINQ运算符可用于使其正常工作?还是我应该坚持循环?

Is there a correct LINQ operator to use to get this to work? Or should I just stick with the loop?

推荐答案

您可以使用Range创建序列:

return Enumerable.Range(0, count).Select(x => new MyObj { bar = foo });

如果要创建List，则必须ToList.

请记住，这(可以说)是一种非显而易见的解决方案，因此，请不要放弃创建列表的迭代方法.

Mind you though, it's (arguably) a non-obvious solution, so don't throw out the iterative way of creating the list just yet.

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