If column contains text add a checkbox in column apps script google sheets - google-apps-script

Question

I am copying data from a spreadsheet titled after the specific month and placing it in my main spreadsheet. I have successfully copied the data into range K80:K94 on my Daily Hub sheet.
In range K80:K94 I now want to add a checkbox in column M if there is a value in column K. For example if there is a value in K80 and K81 there would be a checkbox in M80 and M81. I feel like this should be fairly straightforward, however I have tried a few different options including using IsBlank() and nothing seems to be working.
function dailyhubhabits() {
var montha = new Array(12);
montha[0] = "JANUARY";
montha[1] = "FEBRUARY";
montha[2] = "MARCH";
montha[3] = "APRIL";
montha[4] = "MAY";
montha[5] = "JUNE";
montha[6] = "JULY";
montha[7] = "AUGUST";
montha[8] = "SEPTEMBER";
montha[9] = "OCTOBER";
montha[10] = "NOVEMBER";
montha[11] = "DECEMBER";
var dailyhabitshubmonth = new Date();
var getdhmonth = montha[dailyhabitshubmonth.getMonth()];
Logger.log(getdhmonth);
var mhs = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(getdhmonth);
var monthhabitsogdata = mhs.getRange("C56:E70");
var gethabits = monthhabitsogdata.getValues();
Logger.log(gethabits);
var dhs = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("DAILY HUB");
var habitsarea = dhs.getRange("K80:K94");
monthhabitsogdata.copyTo(habitsarea);
//THIS IS WHERE I AM HAVING TROUBLE
var datavalues = dhs.getRange("K80:K94").getValues();
var data_leng = datavalues.length;
for(var i=0; i<data_leng; i++) {
if(datavalues[i][0].length != 0) {
dhs.getRange(i+1,14).insertCheckboxes();
}
}
}

Answer 1

You want to insert a checkbox on Column M when there is a value in the same row of column K.
There are two problems with this part of your script:
evaluating whether the cell has a value
defining the target range for the checkbox
Does the cell have a value?
length returns the number of records in an array, but it is not a good method for determining whether a cell contains a value. This is a popular topic; you might care to read Google Spreadheets Scripts: check if cell is empty for several methods.
a better approach is !== ""
Defining the target cell
dhs.getRange(i+1,14).insertCheckboxes(); - there are two problems here
Column M is 13
i starts at zero, so the first range value would be .getRange(1,14) = Cell N1.
so you need a variable that defines the startRow, such as:
var startRow = 80
REPLACE
//THIS IS WHERE I AM HAVING TROUBLE
var datavalues = dhs.getRange("K80:K94").getValues();
var data_leng = datavalues.length;
for(var i=0; i<data_leng; i++) {
if(datavalues[i][0].length != 0) {
dhs.getRange(i+1,14).insertCheckboxes();
}
}
WITH
var startRow = 80
var endRow = 94
var datavalues = dhs.getRange("K"+startRow+":K"+endRow).getValues()
var data_leng = datavalues.length;
for(var i=0; i<data_leng; i++) {
if(datavalues[i][0] !=="") {
dhs.getRange(i+startRow,13).insertCheckboxes()
}
}

Answer 2

SUGGESTION
In my understanding, here's your goal:
Check values in K80:K94
Insert a checkbox on a row in M that is adjacent to a row that isn't empty in the K80:K94 range.
Perhaps you could try this sample script to replace your current line on the section in inserting the check-boxes:
/** SUGGESTION
* 1. Iterate through the values in range K80:K94 & identify which aren't empty.
* 2. Get each non-empty values' row numbers.
* 3. To reduce runtime execution in the loop, if there are consecutive non-empty values, set them as a range (e.g. M80:M81). Otherwise a single value will be set as a single range (e.g. M83);
* 4. Iterate through these ranges & insert the checkboxes.
*/
var range = SpreadsheetApp.getActive().getRange('K80:K94');
var temp_values = range.getValues().map((x, i) => x != '' ? [x, (range.getLastRow() - (range.getNumRows() - i) + 1)].flat() : '*');
var ranges = temp_values.join().split('*').map(y => (y.replace(/[a-zA-Z,]+/g, '-')).split('-').filter(x => x != ''));
ranges.map(z => [...new Set([z[0], z[z.length - 1]])]).forEach(
row => row.length > 1 ? SpreadsheetApp.getActive().getRange(`M${row[0]}:M${row[1]}`).insertCheckboxes() :
SpreadsheetApp.getActive().getRange(`M${row[0]}`).insertCheckboxes()
);
/** End */
This sample script runs faster vs your current implementation as it shortens the data to be processed in the loop
Demo
Sample sheet
After running the script