Replacing last characters with a character

.net, c#, linq, string

Solution

You can use a regular expression to figure out the end of the string and then do a normal replace of characters:

Regex.Replace(slug, @"[\d-]+$", m => m.Value.Replace('-', '='));

Quick PowerShell test:

PS> $strings | %{ [Regex]::Replace($_, '[\d-]+$', {$args[0].value.replace('-','=')}) }
my-post
my-post=2
my-post=2=3
my-post=2=3=4=5=6=7=8=9
this-is-my-post
this-is-my-post=2
this-is-my-post=2=3
this-is-my-post=2=3=4=5=6=7
abc-abc-abc
abc-abc-abc=2
abc-abc-abc=2=3=4=5=6
this-is-my-2nd-post

Problem

I can have these possible slug strings ``` my-post my-post-2 my-post-2-3 my-post-2-3-4-5-6-7-8-9 this-is-my-post this-is-my-post-2 this-is-my-post-2-3 this-is-my-post-2-3-4-5-6-7 abc-abc-abc1 abc-abc-abc1-2 abc-abc-abc1-2-3-4-5-6 ``` They can be anything with number or no numbers at the end. What I want to do for example take: ``` this-is-my-post-2-3 ``` Then replace `-2-3` at the end with `=2=3`. So it becomes: ``` this-is-my-post=2=3 ``` So is there a clean way I can do it in linq or by some string parsing or something else?

Original source