Zusammenfassung mehrerer Methoden zur Array-Deduplizierung in js

Array.prototype.distinct = function(){var arr = this,
        result = [],
        i,
        j,
        len = arr.length;for(i = 0; i < len; i++){for(j = i + 1; j < len; j++){if(arr[i] === arr[j]){
                j = ++i;
            }
        }
        result.push(arr[i]);
    }return result;
}var arra = [1,2,3,4,4,1,1,2,1,1,1];
arra.distinct();             //返回[3,4,2,1]

Array.prototype.distinct = function (){var arr = this,
        i,
        j,
        len = arr.length;for(i = 0; i < len; i++){for(j = i + 1; j < len; j++){if(arr[i] == arr[j]){
                arr.splice(j,1);
                len--;
                j--;
            }
        }
    }return arr;
};var a = [1,2,3,4,5,6,5,3,2,4,56,4,1,2,1,1,1,1,1,1,];var b = a.distinct();
console.log(b.toString()); //1,2,3,4,5,6,56

Array.prototype.distinct = function (){var arr = this,
        i,
        obj = {},
        result = [],
        len = arr.length;for(i = 0; i< arr.length; i++){if(!obj[arr[i]]){    //如果能查找到，证明数组元素重复了obj[arr[i]] = 1;
            result.push(arr[i]);
        }
    }return result;
};var a = [1,2,3,4,5,6,5,3,2,4,56,4,1,2,1,1,1,1,1,1,];var b = a.distinct();
console.log(b.toString()); //1,2,3,4,5,6,56

Array.prototype.distinct = function (){var arr = this,
        len = arr.length;

    arr.sort(function(a,b){        //对数组进行排序才能方便比较return a - b;
    })function loop(index){if(index >= 1){if(arr[index] === arr[index-1]){
                arr.splice(index,1);
            }
            loop(index - 1);    //递归loop函数进行去重        }
    }
    loop(len-1);return arr;
};var a = [1,2,3,4,5,6,5,3,2,4,56,4,1,2,1,1,1,1,1,1,56,45,56];var b = a.distinct();
console.log(b.toString());        //1,2,3,4,5,6,45,56

Array.prototype.distinct = function (){var arr = this,
        result = [],
        len = arr.length;

    arr.forEach(function(v, i ,arr){        //这里利用map，filter方法也可以实现var bool =  arr.indexOf(v,i+1);        //从传入参数的下一个索引值开始寻找是否存在重复if(bool === -1){
            result.push(v);
        }
    })return result;
};var a = [1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,3,3,3,3,3,3,3,2,3,3,2,2,1,23,1,23,2,3,2,3,2,3];var b = a.distinct();
console.log(b.toString());    //1,23,2,3

function dedupe(array){return Array.from(new Set(array));
}

dedupe([1,1,2,3]) //[1,2,3]

let arr = [1,2,3,3];
let resultarr = [...new Set(arr)];   
console.log(resultarr);  //[1,2,3]