Hi Monks! I am trying to implement Edit Distance Interview problem in Perl, but seems like there is some issue. Below is my code 

sub editDistance{
    
    my($str1, $str2, $len1, $len2) =  @_;
    
    if ($len1 ==0){
        return $len2;
    }
    
    if ($len2 ==0){
        return $len1;
    }
    
    if(substr($str1, -1) eq substr($str2,-1)){
        return editDistance($str1,$str2,$len1-1,$len2-1);
    }
    my @distance = ();
    push @distance, editDistance($str1, $str2, $len1, $len2-1); #inser
+t
    push @distance, editDistance($str1, $str2, $len1-1, $len2); #remov
+e
    push @distance, editDistance($str1, $str2, $len1-1, $len2-1); #rep
+lace
    
    my $min =  min @distance;
    
    return 1 + $min;
}

my $str1 ="Sundayyyy";
my $str2 = "Saturday";

print editDistance($str1, $str2, length($str1), length($str2))

[download]
Where did I go wrong ? http://www.geeksforgeeks.org/dynamic-programming-set-5-edit-distance/

In reply to Edit Distance Implementation in Perl by kris1511

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