[pkg/ottl] New function: `Index`

[edmocosta]

Component(s)

pkg/ottl

Is your feature request related to a problem? Please describe.

OTTL currently does not support finding the index of a particular item within a slice or string.

Describe the solution you'd like

The new Index(source, value) function would be used to find the index of the first occurrence of value in source, being value the item we're looking for, and source a slice or string. If the value is not present, -1 could be returned.

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• pkg/ottl: @TylerHelmuth @evan-bradley @edmocosta

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[mashhurs]

👋 Can I be a volunteer for this?
@edmocosta any use-case we have?

[edmocosta]

Hi @mashhurs! sure thing! I'll assign it to you. This issue came up from this discussion. The main goal is providing better support for slices, being the string support a plus.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• pkg/ottl: @TylerHelmuth @evan-bradley @edmocosta

See Adding Labels via Comments if you do not have permissions to add labels yourself.