Binary Search in Powershell

Welcome to the Binary Search 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 sorted integers ("1, 4, 5, 11, 12") and the integer to find ("11")'
    Exit 1
}

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

function Test-IsSorted([int[]]$arr) {
    for ($i = 1; $i -lt $arr.Length; $i++) {
        if ($arr[$i - 1] -gt $arr[$i]) {
            return $false
        }
    }

    $true
}

function Invoke-BinarySearch([int[]]$arr, [int]$target) {
    [Array]::BinarySearch($arr, $target)
}

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

try {
    $arr = Parse-IntList $args[0]
    $target = [int]::Parse($args[1])
} catch {
    Show-Usage
}

if (-not (Test-IsSorted $arr)) {
    Show-Usage
}

$idx = Invoke-BinarySearch $arr $target
Write-Output (($idx -ge 0) ? "true" : "false")

Binary Search 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

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