Grygonos,
If your goal is to delete a specific character and you want to do it through your entire string - it would probably be better to use tr. 
$row[0] =~ tr /\///d;

[download]
To answer the question you asked - you would need to add the g modifier to make the substitution global and to make it a null, you would make the subsitution empty: 
$row[0] =~ s/\///g;

[download]
You may also want to check out changing your delimiters so that you avoid the "leaning toothpick" syndrome.

Cheers - L~R

In reply to Re: quick regex question by Limbic~Region
in thread quick regex question by Grygonos

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