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https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
Yukihiro "Matz" Matsumoto
afca99a40b
The ISO standard does not include implicit type conversion using `to_int`. This implicit conversion often causes vulnerability. There will be no more attacks like #4120. In addition, we have added internal convenience method `__to_int` which does type check and conversion (from floats).
29 lines
655 B
Ruby
29 lines
655 B
Ruby
class Range
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##
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# call-seq:
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# rng.first -> obj
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# rng.first(n) -> an_array
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#
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# Returns the first object in the range, or an array of the first +n+
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# elements.
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#
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# (10..20).first #=> 10
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# (10..20).first(3) #=> [10, 11, 12]
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#
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def first(*args)
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return self.begin if args.empty?
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raise ArgumentError, "wrong number of arguments (given #{args.length}, expected 1)" unless args.length == 1
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nv = args[0]
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n = nv.__to_int
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raise ArgumentError, "negative array size (or size too big)" unless 0 <= n
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ary = []
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each do |i|
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break if n <= 0
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ary.push(i)
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n -= 1
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end
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ary
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end
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end
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