--- /dev/null
+module ActiveSupport #:nodoc:
+ module CoreExtensions #:nodoc:
+ module String #:nodoc:
+ unless '1.9'.respond_to?(:force_encoding)
+ # Makes it easier to access parts of a string, such as specific characters and substrings.
+ module Access
+ # 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) # => nil
+ 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) # => nil
+ 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)
+ mb_chars[0..(limit - 1)].to_s
+ 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)
+ (mb_chars[(-limit)..-1] || self).to_s
+ end
+ end
+ else
+ module Access #:nodoc:
+ def at(position)
+ self[position]
+ end
+
+ def from(position)
+ self[position..-1]
+ end
+
+ def to(position)
+ self[0..position]
+ end
+
+ def first(limit = 1)
+ self[0..(limit - 1)]
+ end
+
+ def last(limit = 1)
+ from(-limit) || self
+ end
+ end
+ end
+ end
+ end
+end