Foreach - 并行对象

Question

最近我们开始处理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，我似乎无法找到一种方法来为 foreach -parallel 语句中的每个单独项目创建 [PSCustomObject]。

部分代码解释：

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 哈希表添加一个值。即使尝试以下操作，它仍然失败：

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

Answer 1

您可以将 $Result 分配给 Parallel 块的输出，然后添加其他属性：

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

    Sequence {
        # Add a custom entry to the hashtable
       [Ordered] @{'Fruit' = 'Kiwi'}
    }
}

# Generate a PSCustomObject to work with later on
$Result += [Ordered]@{
    Name  = $I
    Taste = 'Good'
    Price = 'Cheap'
}

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

Answer 2

好的，你去吧，尝试和测试：

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。

Foreach - 并行对象

Foreach -parallel object

powershell

workflow

parallel.foreach