# Javascript column help: Recurring classes
**URL:** https://community.glideapps.com/t/javascript-column-help-recurring-classes/71334
**Category:** Ask for Help
**Created:** [March 1, 2024, 4:16pm UTC](https://community.glideapps.com/t/javascript-column-help-recurring-classes/71334 "2024-03-01T16:16:51Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@teshannon](https://community.glideapps.com/u/teshannon)
#### Post date: [March 1, 2024, 4:16pm UTC](https://community.glideapps.com/t/javascript-column-help-recurring-classes/71334/1 "2024-03-01T16:16:51Z")
Hello, I am trying to setup a scheduling page where when a start date, recurrence pattern (1 for every day, 7 for weekly), and number of sessions (i.e 3) is provided, the remaining two dates are returned as an array.
In the data table, I have the following
I then want to use the Javascript column, and this is the setup:
The code (mind you, I am a total n00b) is here:
```auto
function calculateSchedule() {
const startDate = new Date(p1);
const recurrenceDays = parseInt(p2, 10);
const numSessions = parseInt(p3, 10);
let schedule = [];
for (let i = 1; i < numSessions; i++) {
let nextSessionDate = new Date(startDate.getTime() + recurrenceDays * 86400000 * i);
schedule.push(nextSessionDate.toISOString());
}
return schedule;
}
const output = calculateSchedule();
output;
```
Glide Docs has info on the experimental column but nothing for the javascript column. In testing, I noticed console.log does not provide an output in the javascript column (duh); but it makes me think if there are other limitations within the javascript column? (Besides limited parameters.)
Any help would be greatly appreciated!
---
### Author:  [@Jeff\_Hager](https://community.glideapps.com/u/Jeff_Hager)
#### Post date: [March 1, 2024, 4:20pm UTC](https://community.glideapps.com/t/javascript-column-help-recurring-classes/71334/2 "2024-03-01T16:20:49Z")
A few things.
- You are not passing your parameters as p1, p2, or p3, so your parameters aren’t being used in your code.
- You are not calling the function in your code, so it’s not even going to run.
- You can’t return arrays from a javascript column. You will have to convert it to a comma delimited string first, return the string, then use a Split Text column to convert it to an array.
For starters, add a function call like this outside of the function.
`return generateSessionSchedule(p1, p2, p3);`
This will solve the first two points above.
---
### Author:  [@teshannon](https://community.glideapps.com/u/teshannon)
#### Post date: [March 1, 2024, 4:27pm UTC](https://community.glideapps.com/t/javascript-column-help-recurring-classes/71334/3 "2024-03-01T16:27:41Z")
Jeff, thank you for the time, and I am a partial idiot, I pasted the wrong code.
---
### Author:  [@Jeff\_Hager](https://community.glideapps.com/u/Jeff_Hager)
#### Post date: [March 1, 2024, 4:30pm UTC](https://community.glideapps.com/t/javascript-column-help-recurring-classes/71334/4 "2024-03-01T16:30:25Z")
OK, you still need a return on ‘output’, but you don’t even need to define an output variable. Just do a return on the function call.
You still need to convert your array to a string.
Replace this:
`return schedule;`
With this
`return schedule.join(',');`
---
### Author:  [@teshannon](https://community.glideapps.com/u/teshannon)
#### Post date: [March 1, 2024, 4:44pm UTC](https://community.glideapps.com/t/javascript-column-help-recurring-classes/71334/6 "2024-03-01T16:44:50Z")
Lovely! Absolutely lovely! Thank you for your time.
The working code:
```auto
function calculateSchedule() {
const startDate = new Date(p1);
const recurrenceDays = parseInt(p2, 10);
const numSessions = parseInt(p3, 10);
let schedule = [];
for (let i = 0; i < numSessions; i++) {
let nextSessionDate = new Date(startDate.getTime() + recurrenceDays * 86400000 * i);
schedule.push(nextSessionDate.toISOString());
}
return schedule.join(',');
}
return calculateSchedule();
output;
```
---
### Author:  [@Jeff\_Hager](https://community.glideapps.com/u/Jeff_Hager)
#### Post date: [March 1, 2024, 4:52pm UTC](https://community.glideapps.com/t/javascript-column-help-recurring-classes/71334/7 "2024-03-01T16:52:55Z")
Looks good!
You can get rid of `output;`. It’s not serving a purpose and is probably causing an unseen error because its an undefined variable.
---
### Author:  [@system](https://community.glideapps.com/u/system)
#### Post date: [March 8, 2024, 4:53pm UTC](https://community.glideapps.com/t/javascript-column-help-recurring-classes/71334/8 "2024-03-08T16:53:23Z")
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