/Ruby/Ruby delete first element of array

Ruby delete first element of array

a = [0,1,2,3]

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

a
# => [0,1,2,3]

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 vote247 views2 answers
Rails faker address
Ruby
0 vote277 views1 answer
Ruby on rails scaffold generator example with belongs to relationship
Ruby
0 vote242 views1 answer
Rails undo scaffold
Ruby
0 vote245 views1 answer
Ruby array replace element
Ruby
0 vote228 views1 answer
Httparty headers
Ruby
0 vote266 views1 answer
Add edit or --wait for rails credentials edit windows
Ruby
0 vote242 views1 answer
Write csv with header ruby
Ruby
1 vote239 views1 answer
Ruby hash includes key
Ruby
0 vote256 views1 answer
Ruby read stdin
Ruby
1 vote253 views2 answers
Rails check_box_tag
Ruby