blob: c0d5cdf2d58bc622e42818f3cf9c109f6ed95404 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
require "active_support/multibyte"
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
end
|