Ternary operator-like function

[jetwash]

TL;DR: I'd like a function similar to the ternary operator in C-like languages.

One thing I've found a bit frustrating with go templates is that you can't really conditionally assign to a variable (other than with default, which is great, but limited). For example, let's say that for a certain page type I want to use the parent's Params for some stuff in my template. Currently, AFAIK I'd need to use a scratch variable:

{{ if eq .Type "assertion" }}
  {{ .Scratch.Set "pageParams" .Parent.Params }}
{{ else }}
  {{ .Scratch.Set "pageParams" .Params }}
{{ end }}
{{ $pageParams := .Scratch.Get "pageParams" }}

What I'd like to do is something like

{{ $pageParams := ternary (eq .Type "assertion") .Parent.Params .Params }}

I'm not overly fond of the name "ternary" since not everyone writing Hugo themes is likely to be familiar enough with a C-like language to even know about the ternary operator. Maybe "when" would make sense, or "cond"? I don't really care about the name, though.

[danielpost]

Does this function have any examples/documentation?

[digitalcraftsman]

@danielpost there's a pending pull request for the docs.

[github-actions]

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