Loops Google Sheets Script

Question

The problem I'm trying to solve is the following. I'm trying to make a loop which finds the letter "Y" and only the Y. I want to make it so if a cell has Y in it, it will make the 4 rows to the left of it be called %NULL%. The issue is there are 2 cells per row where Y could be.

This is the code I started but don't know where to go from.

function Loop1(){

  var sheet = SpreadsheetApp.getActive().getSheetByName("EXP50");
  var data = sheet.getDataRange().getValues();

  for(var i = 1; i< data.length; i++){
      if(data[i][7-1] === "Y"){
        sheet.getRange(i + 1, 3).setValue("%NULL%");
        sheet.getRange(i + 1, 4).setValue("%NULL%");
        sheet.getRange(i + 1, 5).setValue("%NULL%");
        sheet.getRange(i + 1, 6).setValue("%NULL%");
      }
      if(data[i][13-1] === "Y") {
        sheet.getRange(i + 1, 9).setValue("%NULL%");
        sheet.getRange(i + 1, 10).setValue("%NULL%");
        sheet.getRange(i + 1, 11).setValue("%NULL%");
        sheet.getRange(i + 1, 12).setValue("%NULL%");        
      }

  }

}

Answer 1

Instead of a if loop, couldn't you use something like this:

function Loop1(){

  var sheet = SpreadsheetApp.getActive().getSheetByName("EXP50");
  var data = sheet.getDataRange().getValues();

  while 1 = 1:
      if(data[i][7-1] === "Y"){
        sheet.getRange(i + 1, 3).setValue("%NULL%");
        sheet.getRange(i + 1, 4).setValue("%NULL%");
        sheet.getRange(i + 1, 5).setValue("%NULL%");
        sheet.getRange(i + 1, 6).setValue("%NULL%");
      }
      if(data[i][13-1] === "Y") {
        sheet.getRange(i + 1, 9).setValue("%NULL%");
        sheet.getRange(i + 1, 10).setValue("%NULL%");
        sheet.getRange(i + 1, 11).setValue("%NULL%");
        sheet.getRange(i + 1, 12).setValue("%NULL%");        
      }

  }

}

(Apologies, I do not know if this will resolve your issue.)

Answer 2

I believe your goal is as follows.

• You want to check the columns "G" and "M".
• When the cell value of the columns is "Y", you want to put %NULL% to the columns "C" - "F" and the columns "I" - "L" in the same row.
• You want to achieve this using Google Apps Script.

Modification points:

• I thought that setValue is used in the loop, the process cost will become high.

In this answer, by reducing the process cost, I would like to propose the following 2 patterns.

Pattern 1:

In this pattern, the methods of getValues and setValues are used.

function Loop1() {
  var sheet = SpreadsheetApp.getActive().getSheetByName("EXP50");
  var range = sheet.getDataRange();
  var data = range.getValues();
  data.forEach(r => {
    var [g, m] = [r[6], r[12]];
    var temp = Array(4).fill("%NULL%");
    if (g == "Y") r.splice(2, 4, ...temp);
    if (m == "Y") r.splice(8, 4, ...temp);
  });
  range.setValues(data);
}

Pattern 2:

In this pattern, TextFinder is used.

function Loop1() {
  var sheet = SpreadsheetApp.getActive().getSheetByName("EXP50");
  var ranges = sheet.createTextFinder("Y").matchCase(true).matchEntireCell(true).findAll().reduce((ar, r) => {
    var col = r.getColumn();
    var row = r.getRow();
    if (col == 7) ar.push(`C${row}:F${row}`);
    if (col == 13) ar.push(`I${row}:L${row}`);
    return ar;
  }, []);
  sheet.getRangeList(ranges).setValue("%NULL%");
}

References:

• getValues()
• setValues(values)
• createTextFinder(findText) of Class Sheet