创建一个填充有对象新实例的列表 [英] Creating a list filled with new instances of an object

问题描述

用相同对象的任意数量的实例创建列表的最佳方法是什么?即有没有更紧凑或有效的方法来执行以下操作?

What's the best way to create a list with an arbitrary number of instances of the same object? i.e is there a more compact or efficient way to do the following?

static List<MyObj> MyObjs = Enumerable.Range(0, 100)
    .Select(i => new MyObj())
    .ToList();

(Enumerable.Repeat将给我十个对同一对象的引用，所以我认为它不起作用.)

(Enumerable.Repeat would give me ten references to the same object, so I don't think it would work.)

推荐答案

这并不难实现为迭代器:

This wouldn't be hard to implement as an iterator:

IEnumerable<T> CreateItems<T> (int count) where T : new() {
    return CreateItems(count, () => new T());
}

IEnumerable<T> CreateItems<T> (int count, Func<T> creator) {
    for (int i = 0; i < count; i++) {
        yield return creator();
    }
}

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