PowerShell/docs/measure-BubbleSort.md

measure-BubbleSort.ps1

This PowerShell script measures the speed of the BubbleSort algorithm. BubbleSort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order. The pass through the list is repeated until the list is sorted. The algorithm, which is a comparison sort, is named for the way smaller or larger elements "bubble" to the top of the list.

Parameters

PS> ./measure-BubbleSort.ps1 [[-numIntegers] <Int32>] [<CommonParameters>]

-numIntegers <Int32>
    Specifies the number of integers to sort
    
    Required?                    false
    Position?                    1
    Default value                1000
    Accept pipeline input?       false
    Accept wildcard characters?  false

[<CommonParameters>]
    This script supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction, 
    WarningVariable, OutBuffer, PipelineVariable, and OutVariable.

Example

PS> ./measure-BubbleSort.ps1
🧭 0.729 sec to sort 1000 integers by BubbleSort

Notes

Author: Markus Fleschutz | License: CC0

Related Links

https://github.com/fleschutz/PowerShell

Script Content

<#
.SYNOPSIS
	Measures the speed of BubbleSort 
.DESCRIPTION
	This PowerShell script measures the speed of the BubbleSort algorithm.
	BubbleSort is a simple sorting algorithm that repeatedly steps through the list,
	compares adjacent elements and swaps them if they are in the wrong order. The pass
	through the list is repeated until the list is sorted. The algorithm, which is a
	comparison sort, is named for the way smaller or larger elements "bubble" to the top of the list.
.PARAMETER numIntegers
	Specifies the number of integers to sort
.EXAMPLE
	PS> ./measure-BubbleSort.ps1
	🧭 0.729 sec to sort 1000 integers by BubbleSort 
.LINK
	https://github.com/fleschutz/PowerShell
.NOTES
	Author: Markus Fleschutz | License: CC0
#>

param([int]$numIntegers = 1000)

class BubbleSort {
    static Sort($targetList) {
        $n = $targetList.Count

        for ($i = 0; $i -lt $n; $i+=1) {
            for ($j = 0; $j -lt $n-1; $j+=1) {
                if($targetList[$j] -gt $targetList[$j+1]) {
                    $temp = $targetList[$j+1]
                    $targetList[$j+1]=$targetList[$j]
                    $targetList[$j]=$temp
                }
            }
        }
    }
}

$list = (1..$NumIntegers | foreach{Get-Random -minimum 1 -maximum $numIntegers})
$stopWatch = [system.diagnostics.stopwatch]::startNew()
[BubbleSort]::Sort($list)
[float]$elapsed = $stopWatch.Elapsed.TotalSeconds
$elapsed3 = "{0:N3}" -f $elapsed # formatted to 3 decimal places
"🧭 $elapsed3 sec to sort $numIntegers integers by BubbleSort"
exit 0 # success

(generated by convert-ps2md.ps1 using the comment-based help of measure-BubbleSort.ps1 as of 01/25/2024 13:28:37)