Variable scoping in KDB

getQuotes: {[sym;start;end]
  url: f[sym;start;end]
  {some_test} {request.quotes[url;x`next_page_token]} \ request.quotes[url;0b] 
  }

I have a while loop. The issue I'm having is that url is out of scope for the while lambda:

'url
  [2]  alpaca.q:47: .alpaca.getQuotes@:{request.quotes[url;x`next_page_token]}
                                                                             
                                                       ^

I have read on this post that this is by design: Variable scope propagation in k, but it doesn't really give me a solution.

I've tried to wrap it in a unary, which didn't work.

I made url global with url::, this did work, but it's not very clean.

Is there a preferred pattern for passing url into the lambda?

You can pass variables into the inner lambdas as parameters:

getQuotes: {[sym;start;end]
  url: f[sym;start;end]
  {some_test} {[x;url]request.quotes[url;x`next_page_token]}[;url] \ request.quotes[url;0b] 
  }