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 vote221 views1 answer
Rails duplicate record
Ruby
0 vote233 views2 answers
Infinite loop in ruby
Ruby
2 votes229 views1 answer
Ruby filename from path
Ruby
0 vote242 views1 answer
Ruby get decimal
Ruby
0 vote289 views1 answer
Ruby is character
Ruby
0 vote215 views1 answer
Sequel ruby different table name
Ruby
0 vote268 views1 answer
Rails select arbitrary n element from array
Ruby
1 vote195 views1 answer
Lewagon rails template
Ruby
0 vote221 views1 answer
Rspec create list
Ruby
0 vote205 views1 answer
Input type checkbox checked with condition rails
Ruby