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Unsuccessful safe_constantize

This example will not work because the string passed in isn't recognized as a constant in the project. Even if you pass in "array", it won't work as it isn't capitalized.

my_string = "not_a_constant" 
  # => 'not_a_constant'
my_string.safe_constantize
  # => nil

my_string = "array" #Not capitalized!
  # => 'array'
my_string.safe_constantize
  # => nil

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