extract id from array and input new array with pluck

My old code

p = Program.all
p_ids = []
p.each {|m| p_ids << m.id }

Refactored code

p_ids = Program.all.pluck(:id)

#pluck (1) #rails (38)

List

$ rails credentials:...... #credentials:help (1) #rails (38)

$ rails generate mig...... #active_record (1) #alter (1) #add_column (1) #add_index (1) #rails (38)

RAILS_ENV=production...... #production (1) #deploy (3) #rake (4) #rails (38)

[What-is-PostgreSQL....... #docker-compose (9) #postgresql (5) #docker (30) #rails (38)

ActionController::Ba...... #ruby (13) #rails (38)

rails new command wi...... #kubernetes (1) #docker (30) #rails (38)

August 18, 2019 Rail...... #rails (38)

FROM ruby:2.6.1 RUN...... #dockerfile (3) #rails (38)

migrate, rollback r...... #docker-compose (9) #docker (30) #rake (4) #rails (38)

$ rails new [PROJECT...... #rails (38)

Hello World