diff options
Diffstat (limited to 'web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-range-ext/mrblib/range.rb')
-rw-r--r-- | web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-range-ext/mrblib/range.rb | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-range-ext/mrblib/range.rb b/web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-range-ext/mrblib/range.rb new file mode 100644 index 00000000..e5d1fb07 --- /dev/null +++ b/web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-range-ext/mrblib/range.rb @@ -0,0 +1,31 @@ +class Range + ## + # call-seq: + # rng.first -> obj + # rng.first(n) -> an_array + # + # Returns the first object in the range, or an array of the first +n+ + # elements. + # + # (10..20).first #=> 10 + # (10..20).first(3) #=> [10, 11, 12] + # + def first(*args) + return self.begin if args.empty? + + raise ArgumentError, "wrong number of arguments (given #{args.length}, expected 1)" unless args.length == 1 + nv = args[0] + raise TypeError, "no implicit conversion from nil to integer" if nv.nil? + raise TypeError, "no implicit conversion of #{nv.class} into Integer" unless nv.respond_to?(:to_int) + n = nv.to_int + raise TypeError, "no implicit conversion of #{nv.class} into Integer" unless n.kind_of?(Integer) + raise ArgumentError, "negative array size (or size too big)" unless 0 <= n + ary = [] + each do |i| + break if n <= 0 + ary.push(i) + n -= 1 + end + ary + end +end |