javascript - Javascript 中的数组填充

Question

我需要将 1 填充为数组 FilteredRPeakThousandDataArray 的元素，从新数组中的索引 500 开始，将 0 填充为其他索引。如下完成，但新数组仅填充 0。 说明:FilteredRPeakThousandDataArray 中索引 600,800,1200,1300 处的元素在所有其他索引(包括索引 2)中应为 1 和 0(因为 2小于 500)

var j = 500;
var FilteredRPeakDataArray = new Array();
var FilteredRPeakDataArray = [2, 600, 800, 1200, 1300];
var FilteredRPeakThousandDataArray = new Array();

for (var i = 0; i < 1500; i++) {
  if (FilteredRPeakDataArray[j] == i) {
    FilteredRPeakThousandDataArray[i] = 1;
  } else {
    FilteredRPeakThousandDataArray[i] = 0;
  }
  
  j++;
}

console.log("FilteredRPeakThousandDataArray " + FilteredRPeakThousandDataArray);

Answer 1

您可以简单地使用 Array.from()。

const FilteredRPeakDataArray = [2, 600, 800, 1200, 1300];

const FilteredRPeakThousandDataArray = Array.from({length: 1500},
 (_, i) => FilteredRPeakDataArray.includes(i) && i > 500 ? 1 : 0
);
console.log(FilteredRPeakThousandDataArray);