Javascript: how to sort array without moving -1 numbers

In= [-1,150,190,170,-1,-1,160,180];
// here you build a filtered array without the -1 numbers
Filtered= [150,190,170,160,180];
// here do a normal sort
Sorted= [150,160,170,180,190];
// here build the Out array by merging the -1 from In and the values from Sorted
Out= [-1,150,160,170,-1,-1,180,190];

function solution(x){	
	var arr = [];
	for(var i = 0; i < x.length; i++){
		if(x[i] != -1){
			arr.push(x[i]);
		}
	}
	arr = arr.sort(function(a,b){return a-b});
	// here you need to build out array
	// Just like you filtered x earlier, you need to loop again in x
	// when you encounter a -1, push it in out array
	// otherwise get next value from arr
	return arr;
}
console.log(solution([-1,150,190,170,-1,-1,180,160]));