Foreach - 并行对象 [英] Foreach -parallel object

问题描述

最近我们开始编写需要很长时间才能完成的脚本.因此，我们深入研究了 PowerShell 工作流程.阅读一些文档后，我了解了基础知识.但是，我似乎找不到为 foreach -parallel 语句中的每个单独项目创建 [PSCustomObject] 的方法.

Recently we started working on scripts that take a very long time to complete. So we dug into PowerShell workflows. After reading some documentation I understand the basics. However, I can't seem to find a way to create a [PSCustomObject] for each individual item within a foreach -parallel statement.

一些代码解释:

Workflow Test-Fruit {

    foreach -parallel ($I in (0..1)) {

        # Create a custom hashtable for this specific object
        $Result = [Ordered]@{
            Name  = $I
            Taste = 'Good'
            Price = 'Cheap'
        }

        Parallel {
            Sequence {
                # Add a custom entry to the hashtable
                $Result += @{'Color' = 'Green'}
            }

            Sequence {
                # Add a custom entry to the hashtable
                $Result += @{'Fruit' = 'Kiwi'}
            }
        }

        # Generate a PSCustomObject to work with later on
        [PSCustomObject]$Result
    }
}

Test-Fruit

出错的部分是从 Sequence 块中向 $Result 哈希表添加值.即使尝试以下操作，它仍然失败:

The part where it goes wrong is in adding a value to the $Result hashtable from within the Sequence block. Even when trying the following, it still fails:

$WORKFLOW:Result += @{'Fruit' = 'Kiwi'}

推荐答案

好的，已经试过了:

Workflow Test-Fruit {

    foreach -parallel ($I in (0..1)) {

        # Create a custom hashtable for this specific object
        $WORKFLOW:Result = [Ordered]@{
            Name  = $I
            Taste = 'Good'
            Price = 'Cheap'
        }

        Parallel {

            Sequence {
                # Add a custom entry to the hashtable
                $WORKFLOW:Result += @{'Color' = 'Green'}
            }

            Sequence {
                # Add a custom entry to the hashtable
                $WORKFLOW:Result += @{'Fruit' = 'Kiwi'}
            }


        }

        # Generate a PSCustomObject to work with later on
        [PSCustomObject]$WORKFLOW:Result
    }
}

Test-Fruit

您应该将其定义为 $WORKFLOW:var 并在整个工作流程中重复使用以访问范围.

You're supposed to define it as $WORKFLOW:var and repeat that use throughout the workflow to access the scope.

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