Method: String#camelcase

Defined in:
lib/core/facets/string/camelcase.rb

#camelcase(*separators) ⇒ Object

Converts a string to camelcase. This method leaves the first character as given. This allows other methods to be used first, such as #uppercase and #lowercase.

"camel_case".camelcase          #=> "camelCase"
"Camel_case".camelcase          #=> "CamelCase"

Custom separators can be used to specify the patterns used to determine where capitalization should occur. By default these are underscores (‘_`) and space characters (`s`).

"camel/case".camelcase('/')     #=> "camelCase"

If the first separator is a symbol, either ‘:lower` or `:upper`, then the first characters of the string will be downcased or upcased respectively.

"camel_case".camelcase(:upper)  #=> "CamelCase"

Note that this implementation is different from ActiveSupport’s. If that is what you are looking for you may want #modulize.



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# File 'lib/core/facets/string/camelcase.rb', line 24

def camelcase(*separators)
  case separators.first
  when Symbol, TrueClass, FalseClass, NilClass
    first_letter = separators.shift
  end

  separators = ['_', '\s'] if separators.empty?

  str = self.dup

  separators.each do |s|
    str = str.gsub(/(?:#{s}+)([a-z])/){ $1.upcase }
  end

  case first_letter
  when :upper, true
    str = str.gsub(/(\A|\s)([a-z])/){ $1 + $2.upcase }
  when :lower, false
    str = str.gsub(/(\A|\s)([A-Z])/){ $1 + $2.downcase }
  end

  str
end