module CoreX::String
Public Class Methods
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.
(This is a mechanical method that doesn’t understand human stuff like acronyms.)
# File lib/core_x/string.rb, line 26 def camelize(string, first_letter_small = false) string = string.to_s if !first_letter_small string = string.sub(/^[a-z\d]*/) { $&.capitalize } else string = string.sub(/^(?:(?=\b|[A-Z_])|\w)/) { $&.downcase } end string.gsub!(/(?:_|(\/))([a-z\d]*)/i) { "#{$1}#{$2.capitalize}" } string.gsub!(/\//, '::') 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
camelize(underscore('SSLError')) # => "SslError"
# File lib/core_x/string.rb, line 53 def underscore(camel_cased_word) return camel_cased_word unless camel_cased_word =~ /[A-Z-]|::/ word = camel_cased_word.to_s.gsub(/::/, '/') word.gsub!(/([A-Z\d]+)([A-Z][a-z])/,'\1_\2') word.gsub!(/([a-z\d])([A-Z])/,'\1_\2') word.tr!("-", "_") word.downcase! word end
Private Instance Methods
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.
(This is a mechanical method that doesn’t understand human stuff like acronyms.)
# File lib/core_x/string.rb, line 26 def camelize(string, first_letter_small = false) string = string.to_s if !first_letter_small string = string.sub(/^[a-z\d]*/) { $&.capitalize } else string = string.sub(/^(?:(?=\b|[A-Z_])|\w)/) { $&.downcase } end string.gsub!(/(?:_|(\/))([a-z\d]*)/i) { "#{$1}#{$2.capitalize}" } string.gsub!(/\//, '::') 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
camelize(underscore('SSLError')) # => "SslError"
# File lib/core_x/string.rb, line 53 def underscore(camel_cased_word) return camel_cased_word unless camel_cased_word =~ /[A-Z-]|::/ word = camel_cased_word.to_s.gsub(/::/, '/') word.gsub!(/([A-Z\d]+)([A-Z][a-z])/,'\1_\2') word.gsub!(/([a-z\d])([A-Z])/,'\1_\2') word.tr!("-", "_") word.downcase! word end