sortAlpha does not work for list of numbers

[ghahramani]

Hi,

I was trying to sort a list of int with sortAlpha and I realized it does not sort it correctly and I found out that it is because of this line https://github.com/Masterminds/sprig/blob/master/list.go#L238 which first converts it to string and then sort it. This is wrong behaviour as it should sort it in the type because then 10 will have precedence over 2. Here is the example that does not sort well

Note: I am using it in the helm chart

{{- (list 0 10 2 4 1 11) | sortAlpha | sortAlpha -}}

The output is

data:[0 1 10 11 2 4]

but it should be

data:[0 1 2 4 10 11]

[chrishalbert]

This is the correct intended behavior. In order to get the behavior you are seeking, there would need to be a sortNumeric function on the lists.

[wi11dey]

Here's a workaround for Helm charts until #392 is merged:

{{- define "sortNumeric" -}}
{{- $strings := list -}}
{{- range $element := . -}}
  {{/* Left-pad with 4 zeros: */}}
  {{- $padded := printf "0000%d" $element -}}
  {{- $padded := trunc (sub 4 (len $padded)) $padded -}}
  {{- $strings := mustAppend $strings $padded -}}
{{- end -}}
{{- $strings := sortAlpha $strings -}}
[{{ join ", " $strings}}]
{{- end -}}

Can be used like

{{ include "sortNumeric" (list 0 10 2 4 1 11) | fromJson }}