创建LINQ批 [英] Create batches in linq

问题描述

有人能提出一个方法在LINQ创造了一定的大小批量？

Can someone suggest a way to create batches of a certain size in linq?

理想我希望能够在某些配置量的块执行操作

Ideally I want to be able to perform operations in chunks of some configurable amount.

推荐答案

您不需要编写任何code。使用 MoreLINQ 批次方法，分批源序列插入水桶大小（MoreLINQ可作为您可以安装的NuGet包）：

You don't need to write any code. Use MoreLINQ Batch method, which batches the source sequence into sized buckets (MoreLINQ is available as a NuGet package you can install):

int size = 10;
var batches = sequence.Batch(size);

哪个被实现为：

public static IEnumerable<IEnumerable<TSource>> Batch<TSource>(
                  this IEnumerable<TSource> source, int size)
{
    TSource[] bucket = null;
    var count = 0;

    foreach (var item in source)
    {
        if (bucket == null)
            bucket = new TSource[size];

        bucket[count++] = item;
        if (count != size)
            continue;

        yield return bucket;

        bucket = null;
        count = 0;
    }

    if (bucket != null && count > 0)
        yield return bucket.Take(count);
}

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