Ability to join list of items into string with separator

[alexandrem]

Something missing in the string functions is to be able to do a traditional join to make a string out of a list of items with a defined delimiter character.

nameservers:
  - "8.8.8.8"
  - "8.8.4.4"

Template:

{{ (datasource "config").nameservers | join " " }}

output => "8.8.8.8 8.8.4.4"

[hairyhenderson]

@alexandrem thanks for taking the time to log this!

There is a join function, but I seem to have missed documenting it 🤦‍♂️. It unfortunately won't work in a pipeline like that (mostly because I didn't think about that usage, and instead chose to follow strings.Join's signature more literally).

But you can use it like:

$  gomplate -i '{{ $a := `[1, 2, 3]` | jsonArray }}{{ join $a "-" }}'
1-2-3

So your template could look like:

{{ join (datasource "config").nameservers " " }}

I've documented it in 8a45646 just now.

[alexandrem]

Great thanks :)