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my $str = 'Fsih my test variable is fsihd or is it gfsih or gfsih +d fsih'; # 1111 2222 3333 + 4444 my $substr = 'fsih'; my $regexp = qr/\Q$substr\E/; my $replace = 'fish'; my $instance = 3; # 3rd print("$str\n"); my $pre_count = $instance - 1; $str =~ s/((?:$regexp.*?){$pre_count})$regexp/$1$replace/; print("$str\n");

You might have noticed both of these are case sensitive. Both can be made case-insensitive. The non-regexp version is most likely much faster. The regexp version can handle regexps instead of constant strings.

In reply to Re^3: Replacing a specfied instance of a pattern in a string by ikegami
in thread Replacing a specfied instance of a pattern in a string by krisahoch

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