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 vote132 views10 answers
Roblox free robux
Ruby
4 votes158 views1 answer
Kill puma pid local
Ruby
0 vote138 views1 answer
Rails add index from console
Ruby
2 votes132 views2 answers
Rails image
Ruby
0 vote134 views2 answers
Ruby timestamp
Ruby
0 vote130 views1 answer
Ruby how to filter through excel
Ruby
-1 vote134 views2 answers
New line
Ruby
0 vote132 views1 answer
Rails activerecord saved_change_to
Ruby
0 vote130 views1 answer
Ruby selenium webdriver proxy with authentication
Ruby
1 vote147 views2 answers
Params except rails
Ruby