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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text/x-ruby;charset=UTF-8
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File size:
1.3 KB
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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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45 | rhs = other.to_s.upcase
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46 | lhs <=> rhs
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47 | end
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48 |
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49 | ##
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50 | # call-seq:
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51 | # sym.casecmp?(other) -> true, false, or nil
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52 | #
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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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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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