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# frozen_string_literal: true
class ReeString::Underscore
include Ree::FnDSL
fn :underscore do
link :acronyms_underscore_regex
end
doc(<<~DOC)
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"
underscore("NRIS", {acronyms: ['NRI']}) # => "nri_s"
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"
DOC
contract(
String,
Ksplat[
acronyms?: ArrayOf[String]
] => String
)
def call(camel_cased_word, **opts)
return camel_cased_word.to_s unless /[A-Z-]|::/.match?(camel_cased_word)
acronyms = opts[:acronyms] || []
regex = acronyms_underscore_regex(acronyms)
word = camel_cased_word.to_s.gsub("::", "/")
word.gsub!(regex) { "#{$1 && '_' }#{$2.downcase}" }
word.gsub!(/([A-Z]+)(?=[A-Z][a-z])|([a-z\d])(?=[A-Z])/) { ($1 || $2) << "_" }
word.tr!("-", "_")
word.downcase!
word
end
end
Version data entries
126 entries across 126 versions & 1 rubygems