CODEWITHSUNDEEP
c#.netstringlinq
maztt
maztt

Reputation: 12304

Replacing last characters with a character

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?

Upvotes: 2

Views: 960

Answers (2)

Guffa
Guffa

Reputation: 700840

You can use a regular expression to isolate the digits at the end, and replace the dashes in it:

Regex.Replace(s, @"(-\d+)+$", m => m.Value.Replace('-', '='))

Example:

this-is-my-2nd-post        ->  this-is-my-2nd-post
this-is-my-2nd-post-1      ->  this-is-my-2nd-post=1
this-is-my-2nd-post-4-5-6  ->  this-is-my-2nd-post=4=5=6

Upvotes: 3

Joey
Joey

Reputation: 354854

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

Upvotes: 9

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