Google Script Optimization - google-apps-script

Question

I have a sheet in which IDs are saved. Now occasionally I need to read these IDs and check if other values(Name) in the sheet still fits the ID. The code I have is:
var name = sheet.getRange(line,row).getValue();
var id = sheet.getRange(line,10).getValue();
if(name!== "" && id === "")
{
try
{ get an ID}
Now from what I read I know that calling each cell value seperately takes way more time. However I am not sure how to apply getValues to have these cases fixed.
Basically the same problem in a different dress I have with the following code:
var id = sheet.getRange(line,row).getValue();
if(id!== "" && id!="Not Found" && id!="Not Found old")
{
var url = "some api url "+id+"api key";
try
{
var str = UrlFetchApp.fetch(url).getContentText();
So how do I use get values to check every ID I get. I guess I would have to use some sort of
foreach(id)
or a
for(i= 0; i <= id.range; i++)
{
use id[i] to blablabal
}
But I have no idea how to implement it, any ideas?
Is there maybe even a different, more efficient way?

Answer 1

After calling getValues you get a double array, like [[valueA1, valueB1], [value A2, value B2]]. Process it in a for loop, which may be a double loop if all row/column combinations are involved. Keep in mind that spreadsheet uses 1-bases indexing but in JavaScript they are 0-based. Often, the top row is headers, so it's omitted from the loop below.
function processData() {
var sheet = SpreadsheetApp.getActiveSheet();
var range = sheet.getDataRange(); // all of data. could be some part of it
var values = range.getValues();
for (var i = 1; i < values.length; i++) { // skipping with header row
for (var j = 0; j < values[0].length; j++) {
if (condition) {
// do something to values[i][j];
}
}
}
range.setValues(values); // put updated values back
}
If the data of interest is in, say, column D, then you can decide to fetch only that column. For example:
function fetchStuff() {
var sheet = SpreadsheetApp.getActiveSheet();
var lastRow = sheet.getLastRow();
var range = sheet.getRange(1, 4, lastRow, 1); // all of column D, note 1-based indexing
var values = range.getValues();
for (var i = 1; i < values.length; i++) { // skipping header row
if (condition) {
var str = UrlFetchApp.fetch(values[i][0]).getContentText();
// do something
}
}
}
Keep in mind that fetch is by far the slowest operation here, and that it is subject to quotas. Use Utilities.sleep(ms) to avoid invoking services too often, and keep track of how much data you are asking the script to fetch.