83 lines
2.5 KiB
Ruby
83 lines
2.5 KiB
Ruby
module ActiveSupport #:nodoc:
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module CoreExtensions #:nodoc:
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module String #:nodoc:
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unless '1.9'.respond_to?(:force_encoding)
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# Makes it easier to access parts of a string, such as specific characters and substrings.
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module Access
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# Returns the character at the +position+ treating the string as an array (where 0 is the first character).
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#
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# Examples:
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# "hello".at(0) # => "h"
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# "hello".at(4) # => "o"
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# "hello".at(10) # => nil
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def at(position)
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chars[position, 1].to_s
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end
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# Returns the remaining of the string from the +position+ treating the string as an array (where 0 is the first character).
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#
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# Examples:
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# "hello".from(0) # => "hello"
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# "hello".from(2) # => "llo"
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# "hello".from(10) # => nil
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def from(position)
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chars[position..-1].to_s
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end
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# Returns the beginning of the string up to the +position+ treating the string as an array (where 0 is the first character).
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#
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# Examples:
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# "hello".to(0) # => "h"
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# "hello".to(2) # => "hel"
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# "hello".to(10) # => "hello"
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def to(position)
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chars[0..position].to_s
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end
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# Returns the first character of the string or the first +limit+ characters.
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#
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# Examples:
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# "hello".first # => "h"
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# "hello".first(2) # => "he"
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# "hello".first(10) # => "hello"
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def first(limit = 1)
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chars[0..(limit - 1)].to_s
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end
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# Returns the last character of the string or the last +limit+ characters.
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#
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# Examples:
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# "hello".last # => "o"
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# "hello".last(2) # => "lo"
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# "hello".last(10) # => "hello"
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def last(limit = 1)
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(chars[(-limit)..-1] || self).to_s
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end
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end
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else
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module Access #:nodoc:
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def at(position)
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self[position]
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end
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def from(position)
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self[position..-1]
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end
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def to(position)
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self[0..position]
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end
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def first(limit = 1)
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self[0..(limit - 1)]
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end
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def last(limit = 1)
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from(-limit) || self
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end
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end
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end
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end
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end
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end
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