Job Sequencing in Powershell

Welcome to the Job Sequencing in Powershell page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

function Show-Usage() {
    Write-Host 'Usage: please provide a list of profits and a list of deadlines'
    Exit 1
}

function Parse-IntList([string]$Str) {
    @($Str.Split(",") | ForEach-Object { [int]::Parse($_) })
}

class Job {
    [int]$Id
    [int]$Profit
    [int]$Deadline

    Job([int]$id, [int]$profit, [int]$deadline) {
        $this.Id = $id
        $this.Profit = $profit
        $this.Deadline = $deadline
    }
}

# Source: https://www.techiedelight.com/job-sequencing-problem-deadlines/
function Invoke-JobSequencing([array]$Profits, [array]$Deadlines) {
    # Set up job details and longest deadline
    $longestDeadline = ($Deadlines | Measure-Object -Maximum).Maximum
    $jobs = @()
    for ($i = 0; $i -lt $Profits.Length; $i++) {
        $jobs += [Job]::new($i, $Profits[$i], $Deadlines[$i])
    }

    # Initialize job slots
    $slots = @($null) * ($longestDeadline + 1)

    # Sort jobs by profit then deadline
    $jobs = $jobs | Sort-Object -Descending -Property Profit, Deadline

    # For each job, see if there is available slot at or before the deadline
    # if so, store this job in that slot
    foreach ($job in $jobs) {
        for ($j = $job.Deadline; $j -ge 1; $j--) {
            if (-not $slots[$j]) {
                $slots[$j] = $job
                break
            }
        }
    }

    $slots
}

function Get-TotalProfit([Job[]]$jobs) {
    ($jobs.Profit | Measure-Object -Sum).Sum
}

if ($args.Length -lt 2 -or -not $args[0] -or -not $args[1]) {
    Show-Usage
}

try {
    $profits = Parse-IntList $args[0]
    $deadlines = Parse-IntList $args[1]
    if ($profits.Length -ne $deadlines.Length) {
        Show-Usage
    }
} catch {
    Show-Usage
}

$jobs = Invoke-JobSequencing $profits $deadlines
Write-Output (Get-TotalProfit $jobs)

Job Sequencing in Powershell was written by:

• rzuckerm

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

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