/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 vote187 views1 answer
Rails include module
Ruby
0 vote173 views1 answer
Using module function in main ruby
Ruby
0 vote185 views1 answer
Ruby is method defined
Ruby
0 vote233 views1 answer
Ruby hash delete
Ruby
0 vote188 views1 answer
Rails remove foreign key
Ruby
0 vote192 views1 answer
Rails console destroy all
Ruby
1 vote184 views2 answers
Ruby iterate hash with index
Ruby
1 vote182 views1 answer
Rails api only with postgress and rspec
Ruby
0 vote179 views1 answer
Rails content for head
Ruby
1 vote208 views1 answer
Rails get source method
Ruby