谷歌脚本按任何列对二维数组进行排序 [英] Google Script sort 2D Array by any column

问题描述

我之前问过一个关于从数据库中检索记录的问题，这里:使用 Google Script 从 Google Sheet 中检索记录

I had a asked an earlier question about retrieving records from a database, here: Retrieving Records from a Google Sheet with Google Script

我对操作数组和创建自己的排序算法相当满意，但由于其速度，我想使用现有的 Array.sort() 方法来组织数据.我发现我可以很容易地使用它来按第一列数据对二维数组进行排序，但我找不到对不同数据列进行排序的语法，而不是第一列.

I'm fairly comfortable with manipulating arrays and creating my own sorting algorithms, but I want to use the existing Array.sort() method to organize the data because of its speed. I'm finding that I can easily use this to sort a 2D array by the first column of data, but I can't find the syntax to sort on a different column of data, other than the first.

我发现的最接近的是:Google Apps Script Additional Sorting Rules.但是，这些输入对我不起作用.这是我从以下代码中得到的，对于我的数组 tableData:

The closest that I've found is this: Google Apps Script Additional Sorting Rules. However, these inputs haven't worked for me. Here is what I get for the following code, for my array, tableData:

tableData.sort([{ column: 1}]);

=>TypeError: (class)@4dde8e64 不是函数，它是对象.(第 49 行，文件sortTablebyCol")

=>TypeError: (class)@4dde8e64 is not a function, it is object. (line 49, file "sortTablebyCol")

tableData.sort([{column: 1, ascending: true}]);

=> TypeError: (class)@4d89c26e 不是函数，它是对象.(第 50 行，文件sortTablebyCol")

=> TypeError: (class)@4d89c26e is not a function, it is object. (line 50, file "sortTablebyCol")

选择要排序的数据列的正确语法是什么?

What is the proper syntax for choosing which column of data to sort on?

推荐答案

array.sort 方法可以有一个函数参数来选择要排序的部分.代码是这样的:

The array.sort method can have a function argument to choose on what part you want to sort. Code goes like this :

    array.sort(function(x,y){
      var xp = x[3];
      var yp = y[3];
// in this example I used the 4th column... 
      return xp == yp ? 0 : xp < yp ? -1 : 1;
    });

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编辑

根据您的评论，这里有一个小的演示功能，应该有助于理解它是如何工作的.

---

EDIT

Following your comment, here is a small demo function that should help to understand how this works.

我没有使用简写形式的 if/else 条件，而是使用传统形式并将其分成 3 行以使其更易于理解.

Instead of using short form if/else condition I used the traditional form and splitted it in 3 lines to make it easier to understand.

function demo(){
  // using a full sheet as array source
  var array = SpreadsheetApp.getActive().getActiveSheet().getDataRange().getValues();
  Logger.log('Unsorted array = '+array);
  array.sort(function(x,y){
// in this example I used the 4th column... 
    var compareArgumentA = x[3];
    var compareArgumentB = y[3];
    // eventually do something with these 2 variables, for example Number(x[0]) and Number(y[0]) would do the comparison on numeric values of first column in the array (index0) 
    // another example x[0].toLowerCase() and y[0].toLowerCase() would do the comparison without taking care of letterCase...
    Logger.log('compareArgumentA = '+compareArgumentA+' and compareArgumentB = '+compareArgumentB);
    var result = 0;// initialize return value and then do the comparison : 3 cases
    if(compareArgumentA == compareArgumentB ){return result }; // if equal return 0
    if(compareArgumentA < compareArgumentB ){result = -1 ; return result }; // if A<B return -1 (you can change this of course and invert the sort order)
    if(compareArgumentA > compareArgumentB ){result = 1 ; return result }; // if a>B return 1
    }
            );
  Logger.log('


Sorted array = '+array);
}

我添加了几个 Logger.log 来检查起始值、中间值和最终值.在电子表格中试试这个.

I added a couple of Logger.log to check starting, intermediate and final values. Try this in a spreadsheet.

希望这会有所帮助.

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