将数组从文档属性与数据范围进行比较不起作用

所以我有一个脚本(谷歌应用脚本(，它从我的一张工作表中提取数据(成对：首字母&&&百分比(，该工作表的值会发生变化(有时只有每周，有时是每天(。

应该根据新值检查旧值并只处理新值，但由于某种原因，它正在处理所有值。

在循环过程中，它首先找到附加到该单元格的电子邮件，然后将生成的电子邮件发送给该人。然后在最后，它存储以前找到的新值。

获取新数据和变量

var data = dataRange.getValues(); // Fetch values for each row in the Range.
    var oldData = [{}];
    //Declare variable

从文档属性获取旧数据。

var oldValues = PropertiesService.getDocumentProperties().getProperties();
//get values from document properties 
var outerArrayOldData = [];
//empty array
var arr4 = [];
//empty array
var thisLoopString,
    thisRowArray;
for (var key in oldValues) {
    //grabbing keys from document properties 'row[i]' and loop for each
    thisLoopString = oldValues[key];
    thisRowArray = []; //Reset
    array
    thisRowArray = thisLoopString.split(","); //Convert the string to partial array
    arr4.push(thisRowArray); //Push the inner array into the outer array
    outerArrayOldData = arr4.concat(outerArrayOldData); //convert outer to actual usable array
    var arr4 = []; //reset arr4 back to 0
};
//End getting old data

将旧数据与新数据进行比较

    var oldData = outerArrayOldData;
    var source = oldData.map(function (row) {
            return JSON.stringify(row);
            //map array to string
        }),
        searchRow,
        dataLength = data.length;
    for (i = 0; i < dataLength; i += 1) {
        searchRow = JSON.stringify(data[i]);
        if (source.indexOf(searchRow) == -1) {
            //search old data and compare to new data using index search and if data isn't in old stack process it through functions
                //doing stuff with new pairs
            }
        }
    }
}

如何将旧数据存储到文档属性。

    var objOldData = {};
    //empty
    var keyName = "",
        //empty
        thisRowArray;
    for (i = 0; i < data.length; i++) {
        keyName = "row" + (i).toString();
        //set keys
        thisRowArray = data[i].toString();
        //convert each pair array to string
        if (thisRowArray == "") continue;
        //skip blanks
        objOldData[keyName] = thisRowArray;
        //add keys and values to properties as a string
    }
    PropertiesService.getDocumentProperties().setProperties(objOldData,
        true); //true deletes all other properties
    //Store the Updated/New Values back to Properties
}

记录器控制台：

<<<<<<<<Imported Range data>>>>>>>>
[[BBB, 0.9], [CCC, 0.76], [DDD, 0.89], [, ]]
<<<<<<<<Old data from dpcument properties>>>>>>>>
[[DDD, 0.89], [, ], [BBB, 0.9], [CCC, 0.76]]

<<<<<Processing New Values Not in Old Data>>>>>
[CCC, 0.76]
[BBB, 0.9]
[DDD, 0.89]
 <<<<<<<<Store the Updated/New Values back to Properties>>>>>>>>
 {row1=CCC,0.76, row0=BBB,0.9, row3=,, row2=DDD,0.89}

如您所见，它仍在处理所有值，即使它们不是新的并且已经存在于系统中。为什么搜索没有发现它们已经存在？我在这方面做错了什么？