Is it possible to access an embedded data field in Javascript when dynamically constructing its field name?



For example, let's say the field I want is `result.elements.0.embeddedData.V1`, but I only know the last character should be `1` at runtime (the number is drawn from a loop & merge index).



I want to do something like:



var n = "${lm://CurrentLoopNumber}"; // ex. n = 1

var ed = eval("${e://Field/result.elements.0.embeddedData.V"+n.toString()+"}");



But this doesn't work, `ed` just comes up `null`.

(Sanity check: `console.log("${e://Field/result.elements.0.embeddedData.V1}");` does produce the value I'm expecting.)



I imagine this is because of the order of operations somehow (either that or `eval()` can't execute `$` syntax?) It seems like by the time my string concatenation occurs, there isn't a good way to access the embedded data with the concatenated name.



Any ideas?



Note: I found this answer which sets embedded data fields with the target index as a second L/M field.



E.g.



LM Field 1 = 2

LM Field 2 = ${e://Field/myfield_2}



That's close to what I want, but because my starting index is variable and is set by a query string, I need to do something more like



with start_ix = 1:

LM Field 1 = $e{e://Field/start_ix + 1}

LM Field 2 = $e{e://Field/myfield + $e{e://Field/start_ix + 1}}



But that doesn't work - nor do I expect it to, as I don't think embedded data "math" supports string concatenation in the same way the `+` operator can concat strings in Javascript.