Remove all elements from slice

support
1

I apologize if this is widely known or trivial. But since it took me several days to figure out… To remove all elements from a slice, you can use

$mySlice = first 0 $mySlice

Assigning to it like this

$mySlice = slice

does not work, although $mySlice := slice creates an empty slice. If there’s another obvious way to achieve this, I’d be glad to hear about it.

Background: I needed slices to collect information about subgroups in a taxonomy term and output at the end of the subgroup’s listings. After each subgroup, the slices had to be cleared for the next one.

2

Unless I’m missing something, that works just fine.

{{ $s := slice }}
$s has {{ $s | len }} elements <br>
{{ $s = $s | append "foo" }}
$s has {{ $s | len }} elements <br>
{{ $s = $s | append "bar" }}
$s has {{ $s | len }} elements <br>
{{ $s = slice }}
$s has {{ $s | len }} elements <br>

$s has 0 elements
$s has 1 elements
$s has 2 elements
$s has 0 elements

3

Hm. It didn’t here. I did not check for len but had the slice printed out by warnf %#v and that always showed some “residual” elements (for lack of a better description.
Just tried it again and now it works as you said. Interesting. Maybe I did something else before.