Module: ActiveSupport::CoreExtensions::String::Access

Included in:
String
Defined in:
lib/active_support/core_ext/string/access.rb,
lib/active_support/core_ext/string/access.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#at(position) ⇒ Object

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



13
14
15
 
# File 'lib/active_support/core_ext/string/access.rb', line 13

def at(position)
  mb_chars[position, 1].to_s
end

#first(limit = 1) ⇒ Object

Returns the first character of the string or the first limit characters.

Examples: 

"hello".first     # => "h"
"hello".first(2)  # => "he"
"hello".first(10) # => "hello"



43
44
45
46
47
48
49
50
51
 
# File 'lib/active_support/core_ext/string/access.rb', line 43

def first(limit = 1)
  if limit == 0
    ''
  elsif limit >= size
    self
  else
    mb_chars[0...limit].to_s
  end
end

#from(position) ⇒ Object

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



23
24
25
 
# File 'lib/active_support/core_ext/string/access.rb', line 23

def from(position)
  mb_chars[position..-1].to_s
end

#last(limit = 1) ⇒ Object

Returns the last character of the string or the last limit characters.

Examples: 

"hello".last     # => "o"
"hello".last(2)  # => "lo"
"hello".last(10) # => "hello"



59
60
61
62
63
64
65
66
67
 
# File 'lib/active_support/core_ext/string/access.rb', line 59

def last(limit = 1)
  if limit == 0
    ''
  elsif limit >= size
    self
  else
    mb_chars[(-limit)..-1].to_s
  end
end

#to(position) ⇒ Object

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"



33
34
35
 
# File 'lib/active_support/core_ext/string/access.rb', line 33

def to(position)
  mb_chars[0..position].to_s
end