如何在JavaScript中结合阵列 [英] How to combine an array in javascript

问题描述

你好，我想根据数组中的唯一项目合并一个数组。

这是我的目标。

  totalCells = []
 

在此totalCells阵列我有几个对象，像这样

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

现在我想打一个阵列基础上，LINENUMBER在那里我有阵列组合。

就像我有LINENUMBER财产和cellWidth集合对象。我可以这样做吗？

我可以遍历每一行和检查的行号相同，然后按该cellwidth。有什么办法，我可以计算？

我试图得到这样的输出。

  totalCells = [
{
  LINENUMBER：1，
  格：[15,16,14]
}，
{
  LINENUMBER：2，
  格：[17,18,14]
}
]
 

解决方案

  VAR newCells = [];
对于（VAR I = 0; I＆LT; totalCells.length;我++）{
    VAR LINENUMBER = totalCells [I] .lineNumber;
    如果（！newCells [LINENUMBER]）{//添加新的对象导致
        newCells [LINENUMBER] = {
            LINENUMBER：行号，
            cellWidth：[]
        };
    }
    //添加此cellWidth到对象
    newcells [LINENUMBER] .cellWidth.push（totalCells [I] .cellWidth）;
}
 

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

The object that I have

totalCells = []

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
  }
];

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

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

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 ?

I'm trying to get an output like this.

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

解决方案

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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