如何在javascript中组合数组 [英] How to combine an array in javascript

问题描述

您好，我想根据数组中的唯一项合并一个数组.

Hello I want to merge a array based on the unique item in the array.

我拥有的对象

totalCells = []

在这个 totalCells 数组中，我有几个这样的对象

In this totalCells array I have several objects like this

totalCells = [
  {
    cellwidth: 15.552999999999999,
    lineNumber: 1
  }, 
  {
    cellwidth: 14,
    lineNumber: 2
  },
  {
    cellwidth: 14.552999999999999,
    lineNumber: 2
  }, 
  {
    cellwidth: 14,
    lineNumber: 1
  }
];

现在我想创建一个数组，其中包含基于 lineNumber 的数组组合.

Now I want to make a array where I have combination of array based on the lineNumber.

就像我有一个带有 lineNumber 属性和 cellWidth 集合的对象.我可以这样做吗?

Like I have a object with lineNumber property and cellWidth collection. Can I do this ?

我可以遍历每一行并检查行号是否相同，然后推送该单元格宽度.有什么办法可以弄清楚吗?

I can loop through each row and check if the line number is same and then push that cellwidth. Is there any way that I can figure ?

我正在尝试获得这样的输出.

I'm trying to get an output like this.

totalCells = [
{
  lineNumber : 1,
  cells : [15,16,14]
},
{
  lineNumber : 2,
  cells : [17,18,14]
}
]

推荐答案

var newCells = [];
for (var i = 0; i < totalCells.length; i++) {
    var lineNumber = totalCells[i].lineNumber;
    if (!newCells[lineNumber]) { // Add new object to result
        newCells[lineNumber] = {
            lineNumber: lineNumber,
            cellWidth: []
        };
    }
    // Add this cellWidth to object
    newcells[lineNumber].cellWidth.push(totalCells[i].cellWidth);
}

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