Negative Array/String Multiplication (Easy Reverse)

Summary of the new feature / enhancement

As a PowerShell user and developer, I often want to reverse an array or string.

As a developer who has been using array multiplication to pretty great effect in Turtle, I think it would be extraordinarily geometrically interesting to be able to reverse and repeat a range of steps in a single statement.

It would also provide a shorter way to reverse a list within a single expression (currently, one has to declare the array and then call [Array]::Reverse, which returns nothing). This benefit of simplicity would also extend to strings.

Proposed technical implementation details (optional)

PowerShell already supports array multiplication of a positive number. It should be fairly trivial to support array multiplication of a negative number as well: simply create a reversed copy and then duplicate that array.

Proposed syntax:

1,2,3 * 2 # will produce 1,2,3,1,2,3
1,2,3 * -2 # should produce 3,2,1,3,2,1

This would also open up easy "reverse iteration", without ranges

# Get a list of files in the current folder in reverse order
foreach ($file in @(Get-ChildItem -Path . -File) * -1) {
    $file
}

Das Issue nennt keine Quelldateien, Tests oder Einstiegspunkte. Beginne damit, die vorhandenen positiven Beispiele für Array-Multiplikation zu reproduzieren, und verfolge dann, wo die Multiplikationssemantik behandelt wird. Als erledigt gilt die Aufgabe, wenn negative Multiplikation Arrays und Strings wie gezeigt umkehrt und wiederholt, einschließlich des Verhaltens bei umgekehrter Iteration.