消除谷歌电子表格中的组合重复

Question

我仍在使用谷歌电子表格进行组合业务，我有 2 列，A 和 B，代表货币及其代码，我想要两种方式的所有“转换”组合。

我成功编写了代码，但是，我现在想消除重复：我的意思是，在结果中，我将有“将美元转换为欧元”、“将欧元转换为美元”、“将美元转换为欧元” 、“欧元兑美元”、“欧元兑美元”和“美元兑欧元”。

但是，我也会有，例如，“欧元对欧元”。

如何在我的代码中解决这个问题：

   function matrix() {
   var sheet = SpreadsheetApp.getActiveSheet();
   var range = 'Sheet1!B4:C19';
   var destID = '1kVhuTwVr80AScne9ijtlWs9YlDf5YkixIFVVbPjoX5E';
   var destcell = 'Sheet1!D27';

   var curr = SpreadsheetApp.getActiveSpreadsheet().getRange(range).getValues();
   var currConv = [];
   for (var i = 0; i < curr.length; i++)
  {
for ( var j = 0; j < curr.length; j++)

{

  currConv.push(['Convert ' + curr[i][0] + ' to ' + ' ' + curr[j][0]]);
  currConv.push(['Convert ' + curr[i][0] + ' to ' + ' ' + curr[j][1]]);
  currConv.push(['Convert ' + curr[i][1] + ' to ' + ' ' + curr[j][0]]);
  currConv.push(['Convert ' + curr[i][1] + ' to ' + ' ' + curr[j][1]]);
}


}           

var destRange = SpreadsheetApp.openById(destID).getRange(destcell).offset(0, 0, currConv.length);
destRange.setValues(currConv);
} 

我尝试插入类似“i != j”的内容，但它给了我一个错误。

非常感谢您的帮助！

Answer 1

首先你需要找到所有重复的索引位置。在数组中查找重复项有 stackoverflow 答案，如以下链接：

stackoverflow - answer - find duplicates

我为这个案例修改了上面链接中的代码。

function removeDuplicates(arr) {
//Code adapted from SO https://stackoverflow.com/a/840849/2946873

  arr = [9, 9, 9, 111, 2, 3, 3, 3, 4, 4, 5, 7];

  var i,
      len=arr.length,
      out=[],
      obj={},
      hasItAlreadyBeenFound="",
      indexPositionsToDelete=[];

  for (i=0;i<len;i++) {
    //check if this value is already in the object
    hasItAlreadyBeenFound = obj[arr[i]];
    if (hasItAlreadyBeenFound!==undefined) {
      Logger.log('Index: ' + i + " is a dup!");
      indexPositionsToDelete.push(i);
    };

    obj[arr[i]]=0;
  }

  //This creates an array of which VALUES are duplicates.  NOT there index number.
  //For this "use case", this following section of code is not needed, but for the sake of demonstration I've left it in.
  for (i in obj) {
    out.push(i);
  }

  //return out;
  Logger.log('Output: ' + out);
  //Log what indexes to delete
  Logger.log('indexPositionsToDelete: ' + indexPositionsToDelete);

  //Delete the value in every cell that is a duplicate
  for (i=0;i<indexPositionsToDelete.length;i+=1) {
    //To Do - get the range - delete the cell value
    //Match the index value of the array to the row number, which may be different

  };
}