flat array

已知如下数组：

var arr = [ [1, 2, 2], [3, 4, 5, 5], [6, 7, 8, 9, [11, 12, [12, 13, [14] ] ] ], 10];

编写一个程序将数组扁平化去并除其中重复部分数据，最终得到一个升序且不重复的数组

simple



arr = [ [1, 2, 2], [3, 4, 5, 5], [6, 7, 8, 9, [11, 12, [12, 13, [14] ] ] ], 10];

(4) [Array(3), Array(4), Array(5), 10]

newArr = arr.flat(Infinity);

(17) [1, 2, 2, 3, 4, 5, 5, 6, 7, 8, 9, 11, 12, 12, 13, 14, 10]

newArr = [...new Set(newArr)];

(14) [1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 10]

newArr.sort((a, b) => a - b > 0 ? 1 : -1);

(14) [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]



arr = [ [1, 2, 2], [3, 4, 5, 5], [6, 7, 8, 9, [11, 12, [12, 13, [14] ] ] ], 10];

(4) [Array(3), Array(4), Array(5), 10]

arrFlat = (arr = []) => {

  let result = [];

  arr.forEach((item, i) => {

   if(Array.isArray(item)) {

     const temp = arrFlat(item)

     result = result.concat(temp);

   } else {

     result.push(item);

   }

  });

  return result;

}

newArr = arrFlat(arr);

(17) [1, 2, 2, 3, 4, 5, 5, 6, 7, 8, 9, 11, 12, 12, 13, 14, 10]



newArr = [...new Set(newArr)];

(14) [1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 10]

newArr.sort((a, b) => a - b > 0 ? 1 : -1);

(14) [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]

巴特西

flat array

flat array

simple

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