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# encoding: utf-8
# This is not loaded if ActiveSupport is already loaded
# This is an almost cut and paste from ActiveSupport v3.0.6, copied in here so that Mail
# itself does not depend on ActiveSupport to avoid versioning conflicts
class String
unless '1.9'.respond_to?(:force_encoding)
# Returns the character at the +position+ treating the string as an array (where 0 is the first character).
#
# Examples:
# "hello".at(0) # => "h"
# "hello".at(4) # => "o"
# "hello".at(10) # => ERROR if < 1.9, nil in 1.9
def at(position)
mb_chars[position, 1].to_s
end
# Returns the remaining of the string from the +position+ treating the string as an array (where 0 is the first character).
#
# Examples:
# "hello".from(0) # => "hello"
# "hello".from(2) # => "llo"
# "hello".from(10) # => "" if < 1.9, nil in 1.9
def from(position)
mb_chars[position..-1].to_s
end
# Returns the beginning of the string up to the +position+ treating the string as an array (where 0 is the first character).
#
# Examples:
# "hello".to(0) # => "h"
# "hello".to(2) # => "hel"
# "hello".to(10) # => "hello"
def to(position)
mb_chars[0..position].to_s
end
# Returns the first character of the string or the first +limit+ characters.
#
# Examples:
# "hello".first # => "h"
# "hello".first(2) # => "he"
# "hello".first(10) # => "hello"
def first(limit = 1)
if limit == 0
''
elsif limit >= size
self
else
mb_chars[0...limit].to_s
end
end
# Returns the last character of the string or the last +limit+ characters.
#
# Examples:
# "hello".last # => "o"
# "hello".last(2) # => "lo"
# "hello".last(10) # => "hello"
def last(limit = 1)
if limit == 0
''
elsif limit >= size
self
else
mb_chars[(-limit)..-1].to_s
end
end
else
def at(position)
self[position]
end
def from(position)
self[position..-1]
end
def to(position)
self[0..position]
end
def first(limit = 1)
if limit == 0
''
elsif limit >= size
self
else
to(limit - 1)
end
end
def last(limit = 1)
if limit == 0
''
elsif limit >= size
self
else
from(-limit)
end
end
end
if Module.method(:const_get).arity == 1
# Tries to find a constant with the name specified in the argument string:
#
# "Module".constantize # => Module
# "Test::Unit".constantize # => Test::Unit
#
# The name is assumed to be the one of a top-level constant, no matter whether
# it starts with "::" or not. No lexical context is taken into account:
#
# C = 'outside'
# module M
# C = 'inside'
# C # => 'inside'
# "C".constantize # => 'outside', same as ::C
# end
#
# NameError is raised when the name is not in CamelCase or the constant is
# unknown.
def constantize
names = self.split('::')
names.shift if names.empty? || names.first.empty?
constant = Object
names.each do |name|
constant = constant.const_defined?(name) ? constant.const_get(name) : constant.const_missing(name)
end
constant
end
else
def constantize #:nodoc:
names = self.split('::')
names.shift if names.empty? || names.first.empty?
constant = Object
names.each do |name|
constant = constant.const_defined?(name, false) ? constant.const_get(name) : constant.const_missing(name)
end
constant
end
end
end
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