Google Script insert formula in 1 column where cell are black - google-apps-script

Question

Hi could someone help me with this script im trying to insert a formula in all the blank cell from (J15) to (J38) here is what ive got but I just cant seem to get it the proper way any help would be greatly appreciated.
function test() {
var ssA = SpreadsheetApp.getActive(); //changed from openById() for my convenience
var ss = ssA.getActiveSheet(); //change from getSheetByName() for my convenience
var range = ss.getRange(15,10,24,1); //row 2 column 7 (G) lastRow 1 column
var data = range.getValues(); //Gets all data
for(var i=0;i<data.length;i++) //this runs over entire selected range
{
if(!data[i][0]) //If true then it's blank
{
data[i](('=Iferror(If(G15="",, if($B$5 = Iferror(query(\'Client
List\'!$A$2:$A, "select A where A =\'"&$B$5&"\'"),""),VLOOKUP($B$5,Client_Rate,2,False),VLOOKUP(D15,Config_Rate_List
,2,False))),"")');)
}
}
range.setFormula(data); //Sets all data.
}

Answer 1

You want to put the formula to "J15:J38". If my understanding is correct, how about this modification?
I thought that it is possible that the cells of "J15:J38" have the values and formulas. So in this modified script, the formula is put to the empty cells which don't have both. The flow of script is as follows.
Retrieve values and formulas from "J15:J38".
Create range list.
Put the formula using setFormula().
I think that there are several solutions for your situation. So please think of this as one of them.
Modified script :
function test() {
var ssA = SpreadsheetApp.getActive(); //changed from openById() for my convenience
var ss = ssA.getActiveSheet(); //change from getSheetByName() for my convenience
var range = ss.getRange(15,10,24,1); //row 2 column 7 (G) lastRow 1 column
var data = range.getValues(); //Gets all data
// The following script was modified.
var formulas = range.getFormulas();
var rangeList = [];
var offset = 15;
for(var i=0;i<data.length;i++) {
if(!data[i][0] && !formulas[i][0]) {
rangeList.push("J" + (offset + i));
}
}
var formula = '=Iferror(If(G15="",, if($B$5 = Iferror(query(\'Client List\'!$A$2:$A, "select A where A =\'"&$B$5&"\'"),""),VLOOKUP($B$5,Client_Rate,2,False),VLOOKUP(D15,Config_Rate_List,2,False))),"")';
ss.getRangeList(rangeList).setFormula(formula);
}
Note :
I was not sure whether the sheet name is Client List or ClientList, because of the line break in your script.
I'm not sure about the formula which was put to cells.
About your title, "black" of "Google Script insert formula in 1 column where cell are black" is "blank"?
Reference :
getRangeList(a1Notations)
If this was not what you want, I'm sorry.
Edit :
Unfortunately, the formulas in an array cannot be put the cells using the range list yet. I think that Sheets API can put various formulas once. But as a simple way, here, I would like to propose the following script.
function test() {
var ssA = SpreadsheetApp.getActive(); //changed from openById() for my convenience
var ss = ssA.getActiveSheet(); //change from getSheetByName() for my convenience
var range = ss.getRange(15,10,24,1); //row 2 column 7 (G) lastRow 1 column
var data = range.getValues(); //Gets all data
// The following script was modified.
var formulas = range.getFormulas();
var val = [];
var offset = 15;
for(var i=0;i<data.length;i++) {
if(!data[i][0] && !formulas[i][0]) {
ss.getRange("J" + (offset + i)).setFormula('=Iferror(If(G' + (offset + i) + '="",, if($B$5 = Iferror(query(\'Client List\'!$A$2:$A, "select A where A =\'"&$B$5&"\'"),""),VLOOKUP($B$5,Client_Rate,2,False),VLOOKUP(D' + (offset + i) + ',Config_Rate_List,2,False))),"")');
}
}
}