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authorYukihiro "Matz" Matsumoto <[email protected]>2015-10-22 07:10:16 +0900
committerYukihiro "Matz" Matsumoto <[email protected]>2015-10-22 07:10:16 +0900
commit727f2485c9028cbd5eb4085e965bcaada6fb53f6 (patch)
treeb6876bcd35017746de47dc5f3949fcb72ea37c16 /mrbgems/mruby-enumerator
parente5fbf9dfa2bbbe5ecbf6cc25ff5d35e7da7f00e3 (diff)
parentd4238494eb7cd36c510c87ace6c31aeb1d0f1d6b (diff)
downloadmruby-727f2485c9028cbd5eb4085e965bcaada6fb53f6.tar.gz
mruby-727f2485c9028cbd5eb4085e965bcaada6fb53f6.zip
Merge pull request #2999 from sagmor/better-docs
More Docs
Diffstat (limited to 'mrbgems/mruby-enumerator')
-rw-r--r--mrbgems/mruby-enumerator/mrblib/enumerator.rb158
1 files changed, 78 insertions, 80 deletions
diff --git a/mrbgems/mruby-enumerator/mrblib/enumerator.rb b/mrbgems/mruby-enumerator/mrblib/enumerator.rb
index c54959e91..9abaca38a 100644
--- a/mrbgems/mruby-enumerator/mrblib/enumerator.rb
+++ b/mrbgems/mruby-enumerator/mrblib/enumerator.rb
@@ -6,92 +6,91 @@
# A class which allows both internal and external iteration.
#
# An Enumerator can be created by the following methods.
-# - Kernel#to_enum
-# - Kernel#enum_for
-# - Enumerator.new
+# - {Kernel#to_enum}
+# - {Kernel#enum_for}
+# - {Enumerator#initialize Enumerator.new}
#
# Most methods have two forms: a block form where the contents
# are evaluated for each item in the enumeration, and a non-block form
# which returns a new Enumerator wrapping the iteration.
#
-# enumerator = %w(one two three).each
-# puts enumerator.class # => Enumerator
+# enumerator = %w(one two three).each
+# puts enumerator.class # => Enumerator
#
-# enumerator.each_with_object("foo") do |item, obj|
-# puts "#{obj}: #{item}"
-# end
+# enumerator.each_with_object("foo") do |item, obj|
+# puts "#{obj}: #{item}"
+# end
#
-# # foo: one
-# # foo: two
-# # foo: three
+# # foo: one
+# # foo: two
+# # foo: three
#
-# enum_with_obj = enumerator.each_with_object("foo")
-# puts enum_with_obj.class # => Enumerator
+# enum_with_obj = enumerator.each_with_object("foo")
+# puts enum_with_obj.class # => Enumerator
#
-# enum_with_obj.each do |item, obj|
-# puts "#{obj}: #{item}"
-# end
+# enum_with_obj.each do |item, obj|
+# puts "#{obj}: #{item}"
+# end
#
-# # foo: one
-# # foo: two
-# # foo: three
+# # foo: one
+# # foo: two
+# # foo: three
#
# This allows you to chain Enumerators together. For example, you
# can map a list's elements to strings containing the index
# and the element as a string via:
#
-# puts %w[foo bar baz].map.with_index { |w, i| "#{i}:#{w}" }
-# # => ["0:foo", "1:bar", "2:baz"]
+# puts %w[foo bar baz].map.with_index { |w, i| "#{i}:#{w}" }
+# # => ["0:foo", "1:bar", "2:baz"]
#
# An Enumerator can also be used as an external iterator.
# For example, Enumerator#next returns the next value of the iterator
# or raises StopIteration if the Enumerator is at the end.
#
-# e = [1,2,3].each # returns an enumerator object.
-# puts e.next # => 1
-# puts e.next # => 2
-# puts e.next # => 3
-# puts e.next # raises StopIteration
+# e = [1,2,3].each # returns an enumerator object.
+# puts e.next # => 1
+# puts e.next # => 2
+# puts e.next # => 3
+# puts e.next # raises StopIteration
#
# You can use this to implement an internal iterator as follows:
#
-# def ext_each(e)
-# while true
-# begin
-# vs = e.next_values
-# rescue StopIteration
-# return $!.result
+# def ext_each(e)
+# while true
+# begin
+# vs = e.next_values
+# rescue StopIteration
+# return $!.result
+# end
+# y = yield(*vs)
+# e.feed y
+# end
# end
-# y = yield(*vs)
-# e.feed y
-# end
-# end
#
-# o = Object.new
+# o = Object.new
#
-# def o.each
-# puts yield
-# puts yield(1)
-# puts yield(1, 2)
-# 3
-# end
+# def o.each
+# puts yield
+# puts yield(1)
+# puts yield(1, 2)
+# 3
+# end
#
-# # use o.each as an internal iterator directly.
-# puts o.each {|*x| puts x; [:b, *x] }
-# # => [], [:b], [1], [:b, 1], [1, 2], [:b, 1, 2], 3
+# # use o.each as an internal iterator directly.
+# puts o.each {|*x| puts x; [:b, *x] }
+# # => [], [:b], [1], [:b, 1], [1, 2], [:b, 1, 2], 3
+#
+# # convert o.each to an external iterator for
+# # implementing an internal iterator.
+# puts ext_each(o.to_enum) {|*x| puts x; [:b, *x] }
+# # => [], [:b], [1], [:b, 1], [1, 2], [:b, 1, 2], 3
#
-# # convert o.each to an external iterator for
-# # implementing an internal iterator.
-# puts ext_each(o.to_enum) {|*x| puts x; [:b, *x] }
-# # => [], [:b], [1], [:b, 1], [1, 2], [:b, 1, 2], 3
-
class Enumerator
include Enumerable
##
- # call-seq:
- # Enumerator.new(size = nil) { |yielder| ... }
- # Enumerator.new(obj, method = :each, *args)
+ # @overload initialize(size = nil, &block)
+ # @overload initialize(obj, method = :each, *args)
#
# Creates a new Enumerator object, which can be used as an
# Enumerable.
@@ -100,15 +99,15 @@ class Enumerator
# which a "yielder" object, given as block parameter, can be used to
# yield a value by calling the +yield+ method (aliased as +<<+):
#
- # fib = Enumerator.new do |y|
- # a = b = 1
- # loop do
- # y << a
- # a, b = b, a + b
+ # fib = Enumerator.new do |y|
+ # a = b = 1
+ # loop do
+ # y << a
+ # a, b = b, a + b
+ # end
# end
- # end
#
- # p fib.take(10) # => [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
+ # p fib.take(10) # => [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
#
def initialize(obj=nil, meth=:each, *args, &block)
if block_given?
@@ -188,8 +187,7 @@ class Enumerator
#
# If no block is given, returns a new Enumerator.
#
- # === Example
- #
+ # @example
# to_three = Enumerator.new do |y|
# 3.times do |x|
# y << x
@@ -582,27 +580,27 @@ module Kernel
#
# Here is such an example, with parameter passing and a sizing block:
#
- # module Enumerable
- # # a generic method to repeat the values of any enumerable
- # def repeat(n)
- # raise ArgumentError, "#{n} is negative!" if n < 0
- # unless block_given?
- # return to_enum(__method__, n) do # __method__ is :repeat here
- # sz = size # Call size and multiply by n...
- # sz * n if sz # but return nil if size itself is nil
+ # module Enumerable
+ # # a generic method to repeat the values of any enumerable
+ # def repeat(n)
+ # raise ArgumentError, "#{n} is negative!" if n < 0
+ # unless block_given?
+ # return to_enum(__method__, n) do # __method__ is :repeat here
+ # sz = size # Call size and multiply by n...
+ # sz * n if sz # but return nil if size itself is nil
+ # end
+ # end
+ # each do |*val|
+ # n.times { yield *val }
# end
- # end
- # each do |*val|
- # n.times { yield *val }
# end
# end
- # end
#
- # %i[hello world].repeat(2) { |w| puts w }
- # # => Prints 'hello', 'hello', 'world', 'world'
- # enum = (1..14).repeat(3)
- # # => returns an Enumerator when called without a block
- # enum.first(4) # => [1, 1, 1, 2]
+ # %i[hello world].repeat(2) { |w| puts w }
+ # # => Prints 'hello', 'hello', 'world', 'world'
+ # enum = (1..14).repeat(3)
+ # # => returns an Enumerator when called without a block
+ # enum.first(4) # => [1, 1, 1, 2]
#
def to_enum(meth=:each, *args)
Enumerator.new self, meth, *args