Concatenating Strings

[dgetty]

Hi Jeremy,

I’m running a PCIbex study via mTurk, and I’m trying to append a global variable “pID” to a URL (code below). However, I can’t seem to figure out how to make this work, as the only thing that shows up in the URL is “[object%20Object]” and not the actual value of the “pID” variable. I’m sure it’s something obvious, but I can’t seem to figure out why this is not working.

newText("<p><a href='https://pitt.co1.qualtrics.com/jfe/form/SV_9suLiT1t7sABeDg?id="+ newText("ID").text( getVar("pID") ) +"' target='_blank' rel="noopener noreferrer">Click here to complete a brief survey on Qualtrics.</a></p>")
    .center()
    .print()

Thanks in advance!

-Doug

[Jeremy]

Hi Doug,

PennController elements, and Text elements in particular, are not strings, so you cannot just concatenate them to a string with +. More info here: https://doc.pcibex.net/how-to-guides/using-javascript/

Here’s how to achieve what you need:

newVar("link")
  .set(getVar("pID"))
  .set(v=>"<p><a href='https://pitt.co1.qualtrics.com/jfe/form/SV_9suLiT1t7sABeDg?id="+v+"' target='_blank' rel='noopener noreferrer'>Click here to complete a brief survey on Qualtrics.</a></p>")
,
newText("")
  .text(getVar("link"))
  .center()
  .print()

Jeremy

[dgetty]

Ahh, that makes sense. Thanks for the solution (it works perfectly!), and for the info on JavaScript.

-Doug

[Author]

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