removing duplicates from array in order to use regex to find match. returning null

[User 12962889]

Im using this function to go through my values that are in an array to find if they equal a small straight ("1234" or "2345" or "3456"); I decided the way id get this to work is by using regular expression , which worked if I got for example "12345". However if i got duplicates of a value , example "12234" it would not work. I used the filter function to get rid of the duplicate values, which worked however when it comes to my regular expressions it keeps returning null even when my x value returns for example "1234". Im thinking there has something to do with the filter function since without it i get values returned but I need it in order to get rid of duplicate values. console[^]

function smstraight(){
var score=0;
var x=dice_value.sort();
// removes duplicates
x=x.filter(function(item,index,inputArray){
return x=inputArray.indexOf(item) ==index;

    }).join("");
  var r1= /\\B(1234)/g;
      var a= x.match(r1);
  var r2=/\\B(2345)/g;
      var b= x.match(r2);
  var r3=/\\B(3456)/g;
     var c= x.match(r3);

    console.log(x);
    if(b== "2345" || a== "1234"|| c=="3456" || x== "12345"||x=="23456"){
    	console.log("hey it works");
    		score+= 30;
	$('.sm').html(score);
    }

}

[Nathan Minier]

I don't think RegEx is the right tool for this. You'd be better served by iterating the array and evaluating for unique values and building a result in the same step:

function smstraight(){
var score=$('.sm').html(score); //maintain score

var source=dice_value.sort();

var result = [source[0]]; //We're going to put the result of our processing in here

for(var i=1; i < source.length, i++){
if(source[i] == source[i-1] + 1) {
result.push(source[i]); //only push result if it matches our increment condition
}
}

if(result.length == 4) // We've got a small straight!
{
console.log("hey it works");
$('.sm').html(score+30);
}
}

Please not I just wrote this in the post, so it's not exactly tested and should be treated as conceptual.

"There are three kinds of lies: lies, damned lies and statistics." - Benjamin Disraeli

[John C Rayan]

you can use a nice lamda for it rather than RegEx