将相同的颜色放置在一起<物以类聚>

将相同的颜色放置在一起

function colorTogether(arr) {
    let newArr = [];
    for (let index = 0; index < arr.length; index++) {
        let indexarr = newArr.indexOf(arr[index]);
        if(indexarr==-1){
            newArr.push(arr[index])
        }else {
            newArr.splice(indexarr,0,arr[index])
        }
    }
    return newArr 
}
let arrColor = [1,1,0,2,0,1,2,0,1,0,2];
console.log(colorTogether(arrColor));