Rails array pop first n elements

Ruby pop array

a = [1, 2, 3, 4]
a.pop()
# => 4

Rails array pop first n elements

array = [1, 2, 3, 4, 5, 6]
array.drop(2)

# => [3, 4, 5, 6]

Ruby exclude from slice

# First of all you have to use splat (*) operator. 
# Then instead of using .slice() and .except() together, you can do this is more efficient way.

columns_to_show = ['age', 'gender', 'cast', 'fee_status']
columns_to_show = columns_to_show - hidden_columns if hidden_columns

patient.slice(*columns_to_show).values

patient.slice('age', 'gender', 'cast', 'fee_status').except(*hidden_columns)
 => {"cast"=>"black", "fee_status"=>"paid"}

Source: stackoverflow.com

Similar codes

0 vote218 views1 answer
Preview mailers rails
Ruby
2 votes223 views1 answer
Ruby open file nokogiri
Ruby
0 vote273 views1 answer
Merge two binary trees sloved in ruby
Ruby
25 votes206 views8 answers
Robux
Ruby
0 vote204 views1 answer
Update ruby version windows
Ruby
0 vote204 views1 answer
Rails pass params in url
Ruby
0 vote214 views1 answer
Chop! ruby
Ruby
1 vote222 views1 answer
Authrenticate to artifactory grails 2.1.1
Ruby
0 vote240 views1 answer
OTP SMS Mobile Verification in Ruby
Ruby
0 vote235 views1 answer
Ruby substring remove
Ruby