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Class: ActiveSupport::StringInquirer

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
EnvironmentInquirer
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::String
Instance Chain:
self, ::String
Inherits: String
Defined in: activesupport/lib/active_support/string_inquirer.rb

Overview

String Inquirer

Wrapping a string in this class gives you a prettier way to test for equality. The value returned by Rails.env is wrapped in a StringInquirer object, so instead of calling this:

Rails.env == 'production'

you can call this:

Rails.env.production?

Instantiating a new StringInquirer

vehicle = ActiveSupport::StringInquirer.new('car')
vehicle.car?   # => true
vehicle.bike?  # => false

Constant Summary

::String - Inherited

BLANK_RE, ENCODED_BLANKS

Instance Attribute Summary

::String - Inherited

#acts_like_string?

Enables more predictable duck-typing on String-like classes.
#blank?

A string is blank if it’s empty or contains whitespaces only:
#is_utf8?

Returns true if string has utf_8 encoding.
#present?

Instance Method Summary

::String - Inherited

#at

If you pass a single integer, returns a substring of one character at that position.
#camelcase

Alias for String#camelize.
#camelize

By default, camelize converts strings to UpperCamelCase.
#classify

Creates a class name from a plural table name like Rails does for table names to models.
#constantize

constantize tries to find a declared constant with the name specified in the string.
#dasherize

Replaces underscores with dashes in the string.
#deconstantize

Removes the rightmost segment from the constant expression in the string.
#demodulize

Removes the module part from the constant expression in the string.
#downcase_first

Converts the first character to lowercase.
#ends_with?,
#exclude?

The inverse of String#include?.
#first

Returns the first character.
#foreign_key

Creates a foreign key name from a class name.
#from

Returns a substring from the given position to the end of the string.
#html_safe

Marks a string as trusted safe.
#humanize

Capitalizes the first word, turns underscores into spaces, and (by default) strips a trailing ‘_id’ if present.
#in_time_zone

Converts String to a TimeWithZone in the current zone if Time.zone or Time.zone_default is set, otherwise converts ::String to a ::Time via String#to_time
#indent

Indents the lines in the receiver:
#indent!

Same as indent, except it indents the receiver in-place.
#inquiry

Wraps the current string in the StringInquirer class, which gives you a prettier way to test for equality.
#last

Returns the last character of the string.
#mb_chars

Multibyte proxy.
#parameterize

Replaces special characters in a string so that it may be used as part of a ‘pretty’ URL.
#pluralize

Returns the plural form of the word in the string.
#remove

Returns a new string with all occurrences of the patterns removed.
#remove!

Alters the string by removing all occurrences of the patterns.
#safe_constantize

safe_constantize tries to find a declared constant with the name specified in the string.
#singularize

The reverse of pluralize, returns the singular form of a word in a string.
#squish

Returns the string, first removing all whitespace on both ends of the string, and then changing remaining consecutive whitespace groups into one space each.
#squish!

Performs a destructive squish.
#starts_with?,
#strip_heredoc

Strips indentation in heredocs.
#tableize

Creates the name of a table like Rails does for models to table names.
#titlecase

Alias for String#titleize.
#titleize

Capitalizes all the words and replaces some characters in the string to create a nicer looking title.
#to

Returns a substring from the beginning of the string to the given position.
#to_date

Converts a string to a ::Date value.
#to_datetime

Converts a string to a ::DateTime value.
#to_time

Converts a string to a ::Time value.
#truncate

Truncates a given text to length truncate_to if text is longer than truncate_to:
#truncate_bytes

Truncates text to at most truncate_to bytes in length without breaking string encoding by splitting multibyte characters or breaking grapheme clusters (“perceptual characters”) by truncating at combining characters.
#truncate_words

Truncates a given text after a given number of words (words_count):
#underscore

The reverse of camelize.
#upcase_first

Converts the first character to uppercase.
#as_json

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name) (private)

[ GitHub ] 

  


# File 'activesupport/lib/active_support/string_inquirer.rb', line 27



def method_missing(method_name, ...)
  if method_name.end_with?("?")
    self == method_name[0..-2]
  else
    super
  end
end


  







Instance Method Details



  

    #respond_to_missing?(method_name, include_private = false)  ⇒ Boolean  (private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/string_inquirer.rb', line 23



def respond_to_missing?(method_name, include_private = false)
  method_name.end_with?("?") || super
end