Last change
on this file was 439, checked in by coas-nagasima, 4 years ago |
mrubyを2.1.1に更新
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Property svn:eol-style
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native
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Property svn:mime-type
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File size:
1.3 KB
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[270] | 1 | class Symbol
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| 2 | include Comparable
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| 3 |
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| 4 | alias intern to_sym
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| 5 |
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| 6 | ##
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| 7 | # call-seq:
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| 8 | # sym.capitalize -> symbol
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| 9 | #
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| 10 | # Same as <code>sym.to_s.capitalize.intern</code>.
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| 11 |
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| 12 | def capitalize
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| 13 | (self.to_s.capitalize! || self).to_sym
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| 14 | end
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| 15 |
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| 16 | ##
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| 17 | # call-seq:
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| 18 | # sym.downcase -> symbol
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| 19 | #
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| 20 | # Same as <code>sym.to_s.downcase.intern</code>.
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| 21 |
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| 22 | def downcase
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| 23 | (self.to_s.downcase! || self).to_sym
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| 24 | end
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| 25 |
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| 26 | ##
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| 27 | # call-seq:
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| 28 | # sym.upcase -> symbol
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| 29 | #
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| 30 | # Same as <code>sym.to_s.upcase.intern</code>.
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| 31 |
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| 32 | def upcase
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| 33 | (self.to_s.upcase! || self).to_sym
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| 34 | end
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| 35 |
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| 36 | ##
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| 37 | # call-seq:
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| 38 | # sym.casecmp(other) -> -1, 0, +1 or nil
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| 39 | #
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| 40 | # Case-insensitive version of <code>Symbol#<=></code>.
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| 41 |
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| 42 | def casecmp(other)
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| 43 | return nil unless other.kind_of?(Symbol)
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| 44 | lhs = self.to_s; lhs.upcase!
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[439] | 45 | rhs = other.to_s.upcase
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[270] | 46 | lhs <=> rhs
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| 47 | end
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| 48 |
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[439] | 49 | ##
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| 50 | # call-seq:
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| 51 | # sym.casecmp?(other) -> true, false, or nil
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[270] | 52 | #
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[439] | 53 | # Returns true if sym and other_sym are equal after case folding,
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| 54 | # false if they are not equal, and nil if other_sym is not a string.
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| 55 |
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| 56 | def casecmp?(sym)
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| 57 | c = self.casecmp(sym)
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| 58 | return nil if c.nil?
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| 59 | return c == 0
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| 60 | end
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| 61 |
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| 62 | #
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[270] | 63 | # call-seq:
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| 64 | # sym.empty? -> true or false
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| 65 | #
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| 66 | # Returns that _sym_ is :"" or not.
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| 67 |
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| 68 | def empty?
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| 69 | self.length == 0
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| 70 | end
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| 71 |
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| 72 | end
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