Comparing multiple values in Google Sheets with App Script for loops - arrays

Question

I would like to compare multiple values in a Google Sheet spreadsheet some using for loops in Google App Script. But i would like some advice on the best way to do it.
To explain below...
I have two spreadsheets, A "FOOD" table, and A "FOOD GROUP" table. 
I've written a for loop script that goes through the entire FOOD table.
If the key value of both tables matches, the script will update a column from the FOOD table with a column from the FOOD GROUP table.
The script works without issues. But it can only compare one column between the 2 tables at a time. I would like to modify this script so I can compare multiple columns at once, without having to create a for loop for each specified column.
I pasted my code below. I can also provide images of my spreadsheet if you need it. 
In any case, I'm new to coding, so any constructive feedback or insight to improve my script will be helpful. I'm happy to answer any questions if anything seems unclear.
function FoodGroup_Test() {
var Data = SpreadsheetApp.getActiveSpreadsheet();
var FoodGroupDataSheet = Data.getSheetByName("Food Groups") // "FoodGroup" sheet
var FoodGroupAllValues = FoodGroupDataSheet.getRange(2, 1, FoodGroupDataSheet.getLastRow()-1,FoodGroupDataSheet.getLastColumn()).getValues();
var FoodGroupDataLastRow = FoodGroupDataSheet.getLastRow();
var FoodDataSheet = Data.getSheetByName("Food") // "Food" sheet
var FoodAllValues = FoodDataSheet.getRange(2, 1, FoodDataSheet.getLastRow()-1,FoodDataSheet.getLastColumn()).getValues();
// Object to contain all FoodGroup column values
var Object = {};
for(var FO = FoodGroupAllValues.length-1;FO>=0;FO--) // for each row in the "FoodGroup" sheet...
{
Object[FoodGroupAllValues[FO][15]] = FoodGroupAllValues[FO][11]; // ...store FoodGroup ID Key value
}
for(var F = FoodAllValues.length-1;F>=0;F--) // for each row in the "Food" sheet...
{
var Food_FoodGroupKey = FoodAllValues[F][94]; // Store FoodGroup Key value.
// ...if the Food value dont match, update it with FoodGroup's value
if (Object[Food_FoodGroupKey] != FoodAllValues[F][95])
{
FoodAllValues[F][95] = Object[Food_FoodGroupKey];
}
}
// declare range to place updated values, then set it.
var FoodDestinationRange = FoodDataSheet.getRange(2, 1, FoodAllValues.length, FoodAllValues[0].length);
FoodDestinationRange.setValues(FoodAllValues);
}
FOOD GROUP Table
FOOD table

Answer 1

In order for your code to work as expected, you should do the following changes to your code:
Update your if condition to this one:
Object[Food_FoodGroupKey] != FoodAllValues[F][95] && object2[] != FAllValues[F][86])
In order to avoid the undefined problem use the following line of code:
FoodDataSheet.createTextFinder("undefined").replaceAllWith("");