[wp-trac] [WordPress Trac] #38743: Introduce add_action_once()

[WordPress Trac]

#38743: Introduce add_action_once()
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 Reporter:  tfrommen         |       Owner:
     Type:  feature request  |      Status:  new
 Priority:  normal           |   Milestone:  Awaiting Review
Component:  Plugins          |     Version:
 Severity:  normal           |  Resolution:
 Keywords:                   |     Focuses:
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Comment (by soulseekah):

 Opps, looks like #43621 is intending to use the same name. Do you think
 you can come up with a different name concept? :)

 `add_filter_unique()` maybe?

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Ticket URL: <https://core.trac.wordpress.org/ticket/38743#comment:4>
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