Summing of Two Arrays in App Scripts (Google Sheets)

Question

I'm working with a Spreadsheet where I need to get the values of 2 ranges (in arrays) and return the sum of those. I found code and tried to plug it in, but it seems to be just concatenating the 2 arrays instead of actually summing them up.

The data I'm pulling is from my spreadsheet. The arrays are 5 Columns and 23 rows. The arrays are of the same size.

Here is my function that grabs the values of each arrays. It will then run it through the Arrays_sum function I found and return and update the table with the new totals.

    function updateBowl(){  
      var row = mainSheet.getActiveCell().getRow();
      var tagCol = mainSheet.getRange("HP52");
      var rowNum = mainSheet.getRange("HO52");
      
      tagCol.setValue("N4:N" + row);
      rowNum.setValue(row);
      
  var humpedData = mainSheet.getRange("HL54:HP77").getValues();
  var processedTable = mainSheet.getRange("ID54:IH77");
  var currentData = processedTable.getValues();
  
  var newTotals = Arrays_sum(humpedData,currentData);
  
  var setNewTotals = processedTable.setValues(newTotals);
    
      Logger.log("New Totals: " + newTotals);
      
    }

This is a function I found that supposedly sums up each array that's plugged into it, but it is not working for me.

function Arrays_sum(array1, array2) 
{
  var result = [];
  var ctr = 0;
  var x=0;

  if (array1.length === 0) 
   return "array1 is empty";
  if (array2.length === 0) 
   return "array2 is empty";   

 while (ctr < array1.length && ctr < array2.length) 
  {
    result.push(array1[ctr] + array2[ctr]);
    ctr++;
  }

 if (ctr === array1.length) 
 {
    for (x = ctr; x < array2.length; x++)   {
      result.push(array2[x]);
    }
  } 
  else
  {
  for (x = ctr; x < array1.length; x++) 
    {
      result.push(array1[x]);
    }
  }
  return result;
}

Any help would be appreciated!

Edit 1: Pasted picture of the log.

Edit 2: In my log picture the first 1386 value is from the first cell in the FIRST array. The second 1386 is the first value in SECOND array. So it seems to concatenating the first row array with the second row array. For my testing purposes the values are the same (because of lazy) but when I can figure out the array sum, the current values and incoming values will be different.

SOLVED

Coopers answer worked. I'm not sure exactly what I tweaked to get it to work but this is the final working script. It gets 2 different arrays (of the same size) and sums the values in each cell, then pastes those values into the second array (the current totals).

function updateBowl(){  
  var row = mainSheet.getActiveCell().getRow();
  var tagCol = mainSheet.getRange("HP52");
  var rowNum = mainSheet.getRange("HO52");
  
  tagCol.setValue("N4:N" + row);
  rowNum.setValue(row);
  
  var humpedData = mainSheet.getRange("HL54:HP77").getValues();
  var processedTable = mainSheet.getRange("ID54:IH77");
  var currentData = processedTable.getValues();
  
  var newTotals = sumarrays(humpedData,currentData);
  
  var setNewTotals = processedTable.setValues(newTotals);

 
  Logger.log("New Totals: " + newTotals);
}


function sumarrays(arr1,arr2) {
  var o=[];
  var html='[';
  arr1.forEach(function(r,i) {
    o[i]=[];
    if(i>0){html+=','};
    html+='[';
    r.forEach(function(c,j){
      if(j>0){html+=','};
      o[i][j]=arr1[i][j]+arr2[i][j];
      html+=o[i][j];
    });
    html+=']';
  });
  html+=']';
  return o;
  SpreadsheetApp.getUi().showModelessDialog(HtmlService.createHtmlOutput(html), 'Output');
}

Answer 1

Try something like this:

function arraytest() {
  const ss=SpreadsheetApp.getActive();
  const sh=ss.getSheetByName('Sheet1');
  const a1=sh.getRange(1,1,9,9).getValues();
  const a2=sh.getRange(1,10,9,9).getValues();
  sumarrays(a1,a2);
}


function sumarrays(arr1,arr2) {
  var o=[];
  var html='[';
  arr1.forEach(function(r,i) {
    o[i]=[];
    if(i>0){html+=','};
    html+='[';
    r.forEach(function(c,j){
      if(j>0){html+=','};
      o[i][j]=arr1[i][j]+arr2[i][j];
      html+=o[i][j];
    });
    html+=']';
  });
  html+=']';
  return o;
  SpreadsheetApp.getUi().showModelessDialog(HtmlService.createHtmlOutput(html), 'Output');
}

Data:

1,10,19,28,37,46,55,64,73,82,91,100,109,118,127,136,145,154,163,172,181
2,11,20,29,38,47,56,65,74,83,92,101,110,119,128,137,146,155,164,173,182
3,12,21,30,39,48,57,66,75,84,93,102,111,120,129,138,147,156,165,174,183
4,13,22,31,40,49,58,67,76,85,94,103,112,121,130,139,148,157,166,175,184
5,14,23,32,41,50,59,68,77,86,95,104,113,122,131,140,149,158,167,176,185
6,15,24,33,42,51,60,69,78,87,96,105,114,123,132,141,150,159,168,177,186
7,16,25,34,43,52,61,70,79,88,97,106,115,124,133,142,151,160,169,178,187
8,17,26,35,44,53,62,71,80,89,98,107,116,125,134,143,152,161,170,179,188
9,18,27,36,45,54,63,72,81,90,99,108,117,126,135,144,153,162,171,180,189

Output:

[[83,101,119,137,155,173,191,209,227],[85,103,121,139,157,175,193,211,229],[87,105,123,141,159,177,195,213,231],[89,107,125,143,161,179,197,215,233],[91,109,127,145,163,181,199,217,235],[93,111,129,147,165,183,201,219,237],[95,113,131,149,167,185,203,221,239],[97,115,133,151,169,187,205,223,241],[99,117,135,153,171,189,207,225,243]]

You can put constraints on it depending upon how the data is collected.

Answer 2

I hope this script will be an answer and a guide.

You can use this inside your spreadsheet as a normal function. Like this:

=arr_arr(A1:D5,"+",F6:K9)

The code:

/**
* Return the sum of total array one + array two
*
* @param {A1:D10} range - First range to sum.
* @param {"+ - / *"} operator - Operator to use.
* @param {E1:F10} range - Second range to sum.
* @return the sum of all the values
* @customfunction
*/
function arr_arr(range1,op,range2) {
  
  const one = [].concat(...range1);
  const two = [].concat(...range2);
  const sumOne = one.reduce((a, b) => a + b, 0);
  const sumTwo = two.reduce((a, b) => a + b, 0);
  let sum = 0;
  
  switch (op) {
    case "+":
      sum = sumOne + sumTwo;
      break;
    case "-":
      sum = sumOne - sumTwo;
      break;
    case "*":
      sum = sumOne * sumTwo;
      break;
    case "/":
      sum = sumOne / sumTwo;
      break;
  }
      
      return sum;
      
  }