Last change
on this file since 446 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
set to
native
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Property svn:mime-type
set to
text/x-ruby
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File size:
1.4 KB
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1 | class Range
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2 | ##
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3 | # call-seq:
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4 | # rng.first -> obj
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5 | # rng.first(n) -> an_array
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6 | #
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7 | # Returns the first object in the range, or an array of the first +n+
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8 | # elements.
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9 | #
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10 | # (10..20).first #=> 10
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11 | # (10..20).first(3) #=> [10, 11, 12]
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12 | #
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13 | def first(*args)
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14 | return self.begin if args.empty?
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15 |
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16 | raise ArgumentError, "wrong number of arguments (given #{args.length}, expected 1)" unless args.length == 1
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17 | nv = args[0]
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18 | n = nv.__to_int
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19 | raise ArgumentError, "negative array size (or size too big)" unless 0 <= n
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20 | ary = []
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21 | each do |i|
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22 | break if n <= 0
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23 | ary.push(i)
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24 | n -= 1
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25 | end
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26 | ary
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27 | end
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28 |
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29 | def max(&block)
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30 | val = self.first
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31 | last = self.last
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32 | return super if block
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33 |
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34 | # fast path for numerics
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35 | if val.kind_of?(Numeric) && last.kind_of?(Numeric)
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36 | raise TypeError if exclude_end? && !last.kind_of?(Fixnum)
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37 | return nil if val > last
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38 | return nil if val == last && exclude_end?
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39 |
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40 | max = last
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41 | max -= 1 if exclude_end?
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42 | return max
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43 | end
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44 |
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45 | # delegate to Enumerable
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46 | super
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47 | end
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48 |
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49 | def min(&block)
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50 | val = self.first
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51 | last = self.last
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52 | return super if block
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53 |
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54 | # fast path for numerics
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55 | if val.kind_of?(Numeric) && last.kind_of?(Numeric)
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56 | return nil if val > last
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57 | return nil if val == last && exclude_end?
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58 |
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59 | min = val
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60 | return min
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61 | end
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62 |
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63 | # delegate to Enumerable
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64 | super
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65 | end
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66 | end
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