Mirror of forum.nim-lang.org

9212 :: Is there a smarter way to change only one field value of a tuple?

• Clavismax (orginal) [2022-06-06T19:45:19+02:00] view original

  This one works, but is ugly, especially if the tuple consists of very many fields.

  var
    frameTextDefaults = (
      author: "Thomas",
      version: "unknown")
  
  frameTextDefaults = (
    author: "Ralf",
    version: frameTextDefaults.version)
  Run

  Alternatively, what can I do if I want to change only one value in a tuple that consists of very many fields?

---

• cblake (orginal) [2022-06-06T19:50:46+02:00] view original

  Here you go:

  var
    frameTextDefaults = (
      author: "Thomas",
      version: "unknown")
  
  echo frameTextDefaults
  frameTextDefaults.author = "Ralf"
  echo frameTextDefaults
  frameTextDefaults[0] = "Thomas Again"
  echo frameTextDefaults
  Run

---

• Clavismax (orginal) [2022-06-06T20:20:04+02:00] view original

  Thank you!

---

• DeletedUser (orginal) [2022-06-07T13:51:49+02:00] view original

  There is also sugar for this:

  import sugar
  
  var
    frameTextDefaults = (
      author: "Thomas",
      version: "unknown")
  
  frameTextDefaults = frameTextDefaults.dup:
    author = "Ralf"
  
  echo frameTextDefaults
  Run

---