Question

我正在尝试编写扁平数组，但是为什么它在代码到达嵌套数据时停止检查？这是[ 1, 2, 3, [ [ [Object] ] ] ]。

请解释为什么它停止通过嵌套数组以及为什么它没有结束。感谢

flatten = function(nestedArray, result) {
    result = [];

    each(nestedArray, function(item){

      if(Array.isArray(item)){
          result = result.concat(item);
      } else {
          result.push(item);
      }
    });
return result;
};

flatten([1, [2], [3, [[[4]]]]])

Answer 1

JavaScript中没有类似each的方法，您可以使用 Array#forEach 和recursion function。

var flatten = function(nestedArray, result) {
  result = [];
  // iterate over array
  nestedArray.forEach(function(item) {
    if (Array.isArray(item)) {
      // do recursion to flatten the inner array and concatenate
      result = result.concat(flatten(item));
    } else {
      result.push(item);
    }
  });
  return result;
};

console.log(flatten([1, [2], [3, [[[4]]]]]));

Answer 2

Dim dblMax As Double
dblMax = Application.WorksheetFunction.Max(dpws.Range("B2:P4"))
Dim chrt As Chart
Set chrt = pws.Shapes.AddChart.Chart

With chrt
    .ChartArea.Left = 200
    .ChartArea.Top = 0
    .ChartArea.Height = 500
    .ChartArea.Width = 800
    .Legend.Position = xlLegendPositionBottom
    .ChartType = xlColumnStacked
    .HasDataTable = True
    .SetSourceData Source:=dpws.UsedRange
    .SeriesCollection("Forecasted % Complete").AxisGroup = 2
    .SeriesCollection("Forecasted % Complete").ChartType = xlLineMarkers
    .SeriesCollection("Forecasted % Complete").MarkerStyle = xlMarkerStyleSquare
    .SeriesCollection("Cumulative").ChartType = xlLine
    ' Added the 2 lines below
    .SeriesCollection("Cumulative").Format.Fill.Visible = msoFalse
    .SeriesCollection("Cumulative").Format.Line.Visible = msoFalse
    .Axes(xlValue).MinimumScale = 0
    .Axes(xlValue).MaximumScale = dblMax + dblMax * 0.2
    .Axes(xlValue, xlSecondary).MinimumScale = 0
    .Axes(xlValue, xlSecondary).MaximumScale = 1
nd With

为什么代码停止检查是否是一个数组？

2 个答案: