Ruby array methods
map => return new array elements
a = [1,2,3]
a.map {|a| a*2 }
[2,4,6]
select => filter the array elements with condition
a= [1, 2,3,5,6]
a.select { |a| a.even? }
return only even numbers
a = [2, 6]
flatten methods
array inside array a = [1,2,3 [1,5]]
a.flatten => [1,2,3,5]
add flatten! or save!
it will instanly assign to itself
here we discussing push(), pop(), .uniq
a = [1,1,2,3,4,4]
add .uniq to array element
a.uniq
a = [1,2,3,4]
return only unique value
in ruby we can push multiple elements using
a.push(5,6,7)
[1,2,3,4,5,6,7]
a.pop()
remove the last the elements of the array
