Conditional borders troubleshooting (Google sheets) - google-apps-script

Question

I have a dataset with four different treatment types in blocks of 5 or 7 rows. I want to add borders between each treatment set, so I tried modifying Tedinoz's code. The problem is that this code only adds a border to unique values, and I want to add a border whenever the value is different from the previous row. How can I modify the if statement if (Treatments.indexOf(row) == -1) to search instead for rows whose value for 'Treatment' is different from the previous row?
Here is the full code:
function lineBetween() {
//setup spreadsheet
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = ss.getSheetByName("Sheet1");
// get key variables
var LastRow = 417
var LastColumn = sheet.getLastColumn();
var NumColumns = 8;
// allow for headers
var headerRows = 1;
//erase any current formatting
var ClearRange = sheet.getRange(1, 1, LastRow, NumColumns).setBorder(false, false, false, false, false, false); // clear all formatting
// get the data
var data = sheet.getRange((+1 + headerRows), 1, (LastRow - headerRows), LastColumn).getValues();
// setup new array
var Treatments = new Array();
// Loop through treatments(Column C)
for (var i in data) {
var row = data[i][2].toString();
// Logger.log("Inside LOOP: i = "+i+", value = "+ row);// DEBUG
// search for unqiue values
if (Treatments.indexOf(row) == -1) { // if value =-1, then the variable is unique
// Logger.log("Inside IF#1: i = "+i+", "+row+" is not referenced. Adding it");//DEBUG
// underline the previous row
if (i != 0) {
// This IF statement to avoid underlining the Header row
var range = sheet.getRange((+i + 1 + headerRows), 1, 1, NumColumns).setBorder(true, false, false, false, false, false, "black", SpreadsheetApp.BorderStyle.SOLID); // format if true
}
// continue to build array
Treatments.push(row);
}
}
// underline the last row of the treatments column
var range = sheet.getRange(LastRow, 1, 1, NumColumns).setBorder(null, null, true, null, false, false, "black", SpreadsheetApp.BorderStyle.SOLID_MEDIUM); // format if true
//Logger.log(Treatments);// DEBUG
}
[1]: https://stackoverflow.com/questions/53053492/conditional-borders-in-google-sheets

Answer 1

Try this:
function lineBetween() {
const ss = SpreadsheetApp.getActiveSpreadsheet();
const sh = ss.getSheetByName("Sheet1");
sh.getDataRange().setBorder(false, false, false, false, false, false); // clear all formatting
let sr = 2;//data start row
const data = sh.getRange(sr, 1, sh.getLastRow() - sr + 1, sh.getLastColumn()).getValues();
data.forEach((r, i, arr) => {
if (i > 0) {
if (r[2] != arr[i - 1][2]) {
sh.getRange(i + sr, 1, 1, sh.getLastColumn()).setBorder(true, true, true, true, false, false);
}
}
});
}
Actually I think this works better for me:
function lineBetween() {
const ss = SpreadsheetApp.getActiveSpreadsheet();
const sh = ss.getSheetByName("Sheet0");
sh.getDataRange().setBorder(false, false, false, false, false, false); // clear all formatting
let sr = 2;//data start row
const data = sh.getRange(sr, 1, sh.getLastRow() - sr + 1, sh.getLastColumn()).getValues();
let uA = [];
let dA = [];
data.forEach((r, i, arr) => {
if (i > 0) {
if (r[2] != arr[i - 1][2]) {
sh.getRange(i + sr, 1, 1, sh.getLastColumn()).setBorder(true, false, false, false, false, false);
}
}
});
}