Destructure named list

[JosiahParry]

Say I have a named list like so:

env_vars <- list(
  "api_key" = "fbivyb137294hgwv",
  "hello" = "world",
  "current_user" = "josiah@parry.com"
)

In an ideal world, we would be able to iterate through named elements in a for loop like so:

for ((key, value) in env_vars) {
 ... 
}

but we don't like in one. I think this may be a place that zeallot may be able to help though I cannot imagine exactly the syntax.

[nteetor]

With an extra line you can achieve something similar,

for (var in env_vars) {
  c(key, value) %<-% var

}

Apologies for the delayed response

[JosiahParry]

@nteetor thanks for the reply!

But that code fundamentally does not work, though. When using (var in list) the subsetting is done with [[ which removes the name. Furthermore, the names are not their owned named list element.

The potential approach in dotty seems fairly sensible.

[nteetor]

You're right, my reply was way off. I would instead drop zeallot,

for (key in names(env_vars)) {
  value <- env_vars[[key]]

}

[nteetor]

Thanks for the link to dotty, that's an interesting approach