/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

1 vote200 views2 answers
Attr_accessor ruby
Ruby
0 vote203 views1 answer
Rails column datetime
Ruby
0 vote210 views2 answers
Infinite loop ruby
Ruby
1 vote191 views1 answer
Eager load polymorphic rails
Ruby
9 votes204 views3 answers
Ruby replace words in a string
Ruby
0 vote217 views1 answer
Ruby get current datetime
Ruby
0 vote197 views1 answer
Rails validates if present
Ruby
0 vote210 views1 answer
Ruby basic arithmetic
Ruby
0 vote215 views1 answer
Ruby remove whitespace beginning and end
Ruby
0 vote213 views1 answer
Ruby unshift method
Ruby