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module Xi::CoreExt
# String Inflectors, taken from ActiveSupport 5.0 source code
module String
# Converts strings to UpperCamelCase.
# If the +uppercase_first_letter+ parameter is set to false, then produces
# lowerCamelCase.
#
# Also converts '/' to '::' which is useful for converting
# paths to namespaces.
#
# camelize('active_model') # => "ActiveModel"
# camelize('active_model', false) # => "activeModel"
# camelize('active_model/errors') # => "ActiveModel::Errors"
# camelize('active_model/errors', false) # => "activeModel::Errors"
#
# As a rule of thumb you can think of +camelize+ as the inverse of
# #underscore, though there are cases where that does not hold:
#
# camelize(underscore('SSLError')) # => "SslError"
def camelize
string = self.sub(/^[a-z\d]*/) { |match| match.capitalize }
string.gsub!(/(?:_|(\/))([a-z\d]*)/i) { "#{$1}#{$2.capitalize}" }
string.gsub!('/'.freeze, '::'.freeze)
string
end
# Makes an underscored, lowercase form from the expression in the string.
#
# Changes '::' to '/' to convert namespaces to paths.
#
# underscore('ActiveModel') # => "active_model"
# underscore('ActiveModel::Errors') # => "active_model/errors"
#
# As a rule of thumb you can think of +underscore+ as the inverse of
# #camelize, though there are cases where that does not hold:
#
# camelize(underscore('SSLError')) # => "SslError"
def underscore
return self unless self =~ /[A-Z-]|::/
word = self.to_s.gsub('::'.freeze, '/'.freeze)
word.gsub!(/([A-Z\d]+)([A-Z][a-z])/, '\1_\2'.freeze)
word.gsub!(/([a-z\d])([A-Z])/, '\1_\2'.freeze)
word.tr!("-".freeze, "_".freeze)
word.downcase!
word
end
end
end
class String
include Xi::CoreExt::String
end
Version data entries
8 entries across 8 versions & 1 rubygems