sorry, I thought it was a string, in this case try this:
With(
{item:First(MyCollection)},
Set(
vRegex,
{
id:Split(Substitute(Substitute(item.id,"[",""),"]",""),","),
filename:Split(Substitute(Substitute(item.filename,"[",""),"]",""),","),
createdon:Split(Substitute(Substitute(item.createdon,"[",""),"]",""),",")
}
)
);
ClearCollect(
colFinal,
ForAll(
Sequence(CountRows(vRegex.id)),
{
id:Index(vRegex.id, ThisRecord.Value).Value,
filename:Index(vRegex.filename, ThisRecord.Value).Value,
createdon:Index(vRegex.createdon, ThisRecord.Value).Value
}
)
);