Monthly Archives: November 2018

How can you test if a string contains a numeric character? The simple answer is to use a regular expression.  If you’ve been reading my stuff for any length of time you’ll know how much I love regular expressions. This … Continue reading →

I sort of brushed over it on my last post but this is how you reverse a string. function get-reversestring {   [CmdletBinding()]   param (     [string]$teststring   )   $ca = $teststring.ToCharArray()   [array]::Reverse($ca)   -join $ca } Take the input string … Continue reading →

This is the first in a short series in which I’ll look at some string handling techniques.  PowerShell is all about objects but sometimes you just have to work with the basics. In this post I’ll show how to test … Continue reading →

There’s a third way to find pairs for given sum that’s a bit more complicated. function get-pairs2 {   [CmdletBinding()]   param (     [int[]]$iarray,     [int]$value   )        $sarray = $iarray | Sort-Object   Write-Information -MessageData “Array: $iarray” -InformationAction Continue   Write-Information -MessageData … Continue reading →

Last time I showed a brute force way to find the pairs of numbers in an array that would sum to a given value. This time I have a more elegant way to find pairs. function get-pairs1 {   [CmdletBinding()]   param … Continue reading →

If you have an array of integers how do you find pairs that give required sum. In other words which pairs of numbers add up to a given value. There are a number of ways to solve this. Lets start … Continue reading →

Ever needed to reverse an array? If its sorted then sorting in the opposite direction will work. Most arrays aren’t sorted so you need to use the Reverse static method of the array class Here’s some examples $carray = ‘a’,’b’,’c’,’d’,’e’,’f’,’g’,’h’,’i’,’j’,’k’,’l’,’m’,’n’,’o’,’p’,’q’,’r’,’s’,’t’,’u’,’v’,’w’,’x’,’y’,’z’ … Continue reading →