Fill down - Google Apps Script for Spreadsheets

Question

Is there a function that can fill down data to all empty cells from the row above?

If not, could anyone help me out with a Google Apps Script (or other solution) tha

Answer 1

Here's a working script that adds a custom menu to your Google Sheet. Load the script for a Google Sheet, select a range on the sheet, and select "Fill Blank Cells" from the custom menu. Blank cells will be filled with the value of the cell above.

function onOpen() {
  var ui = SpreadsheetApp.getUi();
  // Or DocumentApp or FormApp.
  ui.createMenu('Custom Menu')
      .addItem('Fill Blank Cells', 'menuItem1')
      .addToUi();
}

function menuItem1() {
  fillBlankWithAbove()
}

//Iterates over the range from top to bottom
//and left to right, and fills blank cells 
//with the value right above them.
function fillBlankWithAbove() {
  var sheet = SpreadsheetApp.getActiveSheet();
  var range = sheet.getActiveRange();
  Logger.log('Range height is: ' + range.getHeight());
  var values = range.getValues();

  var width = values[0].length;
  var height = values.length;
  Logger.log('Width is ' + width);
  Logger.log('Height is ' + height);

  for (var i = 0; i < width; i++) {
    var lastVal = '';
    for(var j = 0; j < height; j++) {   
      var currValue = values[j][i];

      var dataType = typeof(currValue);
      //Empty string check returns true if dataType
      //is a number, and value is zero.  In that case
      //we don't want to overwrite the zero, so only
      //check emptyString for string types.
      if(currValue === undefined || 
         (dataType === 'string' && currValue == '')
        )  {
        //getCell parameters are relative to the current range
        //and ones based
         var cell = range.getCell(j+1, i+1);
         cell.setValue(lastVal);

      }
      else {
        lastVal = currValue;
      }
    }
  }
  SpreadsheetApp.flush();
}