TypeError：找不到函数使用Array.prototype时 [英] TypeError: Cannot find function When using Array.prototype

问题描述

我有一个非常简单的函数，我试图添加到数组中。我在这个网站上看到过一些例子，人们已经扩展了不同的简单项目，比如String&阵列。但是我也看到了谷歌不允许你扩展某些类的评论。但从我所知道的情况来看，这只适用于自定义的Google类，如电子表格，范围等。

为什么抛出TypeError？试图使用相同的功能我在这里找到。

  Array.prototype.findIndex = function（search）{
 if（search ==）return false; 
 for（var i = 0; i< this.length; i ++）
 if（this [i] == search）return i; 
 
返回-1; 
} 
 
 //在特定范围内搜索，找到正确的ID并根据ID 
函数onEdit（e）{
 var e = {}; 
 e.value =Test String; 
 var client = e.value; 
 var columnValues = mydoc.getRangeByName（categoryRangeName）.getValues（）; 
 
 // columnValues返回二维数组值
 //https://developers.google.com/apps-script/reference/spreadsheet/range#getValues（）
 var searchResult = columnValues.findIndex（e.value）; // **错误在这里** 
 
} 
  

更新

我还会补充一点，我设置方法返回一个像这样的值只是为了测试原型没有问题，
$ b

  Array.prototype.findIndex = function（val）{
 return val; 
 
 $ / code> 

我用相同的for循环创建了一个函数，它工作得很好。



 函数findIndex（vals，search）{
 if（search ==）return false; 
 for（var i = 0; i< vals.length; i ++）
 if（vals [i] == search）return i; 
 
返回-1; 
 
  




解决方案 findIndex 函数，在一维数组上搜索，但是，您有一个二维数组。您必须更改 findIndex 函数以在2D数组上进行搜索。

  Array.prototype.findIndex = function（search）{
 if（search ===''）return false; 
 for（var i = 0，len = this.length; i< len; i ++）
 if（this [i] === search）return i; 
返回-1; 
} 
 
 function onEdit（e）{
 var search_text ='Test String'; 
 var columnValues1D = ['String Test'，'Test String']; 
 var columnValues2D = [['String Test']，['Test String']]; 
 Logger.log（columnValues1D.findIndex（search_text））; //<  -  1 
 Logger.log（columnValues2D [0] .findIndex（search_text））; //<  -  -1 
 Logger.log（columnValues2D [1] .findIndex（search_text））; //<  -  0 
} 
  

更新

  Array.prototype.findIndex = function（search）{
 if（search == =''）return false; 
 for（var i = 0，len = this.length; i< len; i ++）
 if（this [i] [0] === search）return i; 
返回-1; 
} 
 
 function onEdit（e）{
 var search_text ='Test String'; 
 var columnValues2D = [['String Test']，['Test String']]; 
 Logger.log（columnValues2D.findIndex（search_text））; //<  -  1 
} 
  

I have a very simple function I am trying to add to an array. I have seen examples on this site where people have extended different simple items, like String & Array. But I also have seen comments where Google doesn't allow you to extend certain classes. But from what I can tell, that was only for custom Google classes, like Spreadsheet, Range, etc.

Why is this throwing a TypeError? Tried to use the same function I found here.

Array.prototype.findIndex = function(search){
  if(search == "") return false;
  for (var i=0; i<this.length; i++)
    if (this[i] == search) return i;

  return -1;
} 

//Do a search on a specific range, find the correct ID, and do a lookup based on ID
function onEdit(e) {
  var e = {};
  e.value = "Test String";
  var client = e.value;
  var columnValues = mydoc.getRangeByName(categoryRangeName).getValues();

  //columnValues returns 2D array of values
  //https://developers.google.com/apps-script/reference/spreadsheet/range#getValues()
  var searchResult = columnValues.findIndex(e.value);  //**ERROR HERE**

}

UPDATE

I will also add, that I set the method to just return a value like this just to test that there was no problem with the prototype, and it failed on the same error.

Array.prototype.findIndex = function(val) {
  return val;
} 

And I created a function with the same for loop, and it works just fine.

function findIndex(vals, search) {
  if(search == "") return false;
  for (var i=0; i<vals.length; i++)
    if (vals[i] == search) return i;

  return -1;
}

解决方案

The findIndex function, search on a 1D array, however, you have a 2D array. You must change the findIndex function to search on a 2D array.

Array.prototype.findIndex = function(search) {
  if(search === '') return false;
  for (var i = 0, len = this.length; i < len; i++)
    if (this[i] === search) return i;
  return -1;
}

function onEdit(e) {
  var search_text = 'Test String';
  var columnValues1D = ['String Test', 'Test String'];
  var columnValues2D = [['String Test'], ['Test String']];
  Logger.log(columnValues1D.findIndex(search_text)); // <-- 1
  Logger.log(columnValues2D[0].findIndex(search_text)); // <-- -1
  Logger.log(columnValues2D[1].findIndex(search_text)); // <-- 0
}

UPDATE

Array.prototype.findIndex = function(search) {
  if(search === '') return false;
  for (var i = 0, len = this.length; i < len; i++)
    if (this[i][0] === search) return i;
  return -1;
}

function onEdit(e) {
  var search_text = 'Test String';
  var columnValues2D = [['String Test'], ['Test String']];
  Logger.log(columnValues2D.findIndex(search_text)); // <-- 1
}

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