remove nil in array ruby
# A simple example function, which returns a value or nil
def transform(n)
rand > 0.5 ? n * 10 : nil }
end
items.map! { |x| transform(x) } # [1, 2, 3, 4, 5] => [10, nil, 30, 40, nil]
items.reject! { |x| x.nil? } # [10, nil, 30, 40, nil] => [10, 30, 40]
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# Altering the array:
a = [3, 2, 4, 6, 3, 8]
a.delete(3)
#=> 3
a
#=> [2, 4, 6, 8]
# Creating new array:
b = [3, 2, 4, 6, 3, 8]
b - [3]
#=> [2, 4, 6, 8]
b
#=> [3, 2, 4, 6, 3, 8]
Thank you!
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