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検索結果
先頭5件
-
String
# b -> String (26108.0) -
self の文字エンコーディングを ASCII-8BIT にした文字列の複製を返します。
...self の文字エンコーディングを ASCII-8BIT にした文字列の複製を返します。
//emlist[例][ruby]{
'abc123'.encoding # => #<Encoding:UTF-8>
'abc123'.b.encoding # => #<Encoding:ASCII-8BIT>
//}... -
Bignum
# bit _ length -> Integer (17101.0) -
self を表すのに必要なビット数を返します。
...-2**10000-1).bit_length # => 10001
(-2**10000).bit_length # => 10000
(-2**10000+1).bit_length # => 10000
(-2**1000-1).bit_length # => 1001
(-2**1000).bit_length # => 1000
(-2**1000+1).bit_length # => 1000
(2**1000-1).bit_length # => 1000
(2**1000).bit_length......# => 1001
(2**1000+1).bit_length # => 1001
(2**10000-1).bit_length # => 10000
(2**10000).bit_length # => 10001
(2**10000+1).bit_length # => 10001
@see Fixnum#bit_length... -
Encoding
:: InvalidByteSequenceError # error _ bytes -> String (17101.0) -
エラー発生時に捨てられたバイト列を返します。
...][ruby]{
ec = Encoding::Converter.new("EUC-JP", "ISO-8859-1")
begin
ec.convert("abc\xA1\xFFdef")
rescue Encoding::InvalidByteSequenceError
p $!
#=> #<Encoding::InvalidByteSequenceError: "\xA1" followed by "\xFF" on EUC-JP>
puts $!.error_bytes.dump #=> "\xA1"
puts $!.readagain_byte......s.dump #=> "\xFF"
end
//}
@see Encoding::InvalidByteSequenceError#readagain_bytes... -
Encoding
:: InvalidByteSequenceError # readagain _ bytes -> String (17101.0) -
エラー発生時に読み直さなければならないバイト列を返します。
...エラー発生時に読み直さなければならないバイト列を返します。
@see Encoding::InvalidByteSequenceError#error_bytes... -
Object
# object _ id -> Integer (17101.0) -
各オブジェクトに対して一意な整数を返します。あるオブジェクトに対し てどのような整数が割り当てられるかは不定です。
...。
Rubyでは、(Garbage Collectされていない)アクティブなオブジェクト間で
重複しない整数(object_id)が各オブジェクトにひとつずつ割り当てられています。この
メソッドはその値を返します。
TrueClass, FalseClass, NilClass, Symbol, Integ......er クラス
のインスタンスなど Immutable(変更不可)なオブジェクトの一部は同じ内容ならば必ず同じ object_id になります。
これは、Immutable ならば複数の場所から参照されても`破壊的操作'による問題が発生しないので、
同......emlist[][ruby]{
p "ruby".object_id #=> 60
p "ruby".object_id #=> 80
p [].object_id #=> 100
p [].object_id #=> 120
p :ruby.object_id #=> 710428
p :ruby.object_id #=> 710428
p 11.object_id #=> 23
p 11.object_id #=> 23
p true.object_id #=> 20
p true.object_id #=> 20
//}
@see Object#equal?,Symbol... -
Thread
:: Backtrace :: Location # base _ label -> String (17101.0) -
self が表すフレームの基本ラベルを返します。通常、 Thread::Backtrace::Location#label から修飾を取り除いたもので構成 されます。
...read::Backtrace::Location#label から修飾を取り除いたもので構成
されます。
//emlist[例][ruby]{
# foo.rb
class Foo
attr_accessor :locations
def initialize(skip)
@locations = caller_locations(skip)
end
end
Foo.new(0..2).locations.map do |call|
puts call.base_label
end......# => initialize
# new
# <main>
//}
@see Thread::Backtrace::Location#label... -
Enumerable
# each _ with _ object(obj) {|(*args) , memo _ obj| . . . } -> object (14401.0) -
与えられた任意のオブジェクトと要素をブロックに渡し繰り返し、最初に与えられたオブジェクトを返します。
...返します。
ブロックを省略した場合は Enumerator を返します。
@param obj 任意のオブジェクトを指定します。
//emlist[例][ruby]{
evens = (1..10).each_with_object([]) {|i, a| a << i*2 }
# => [2, 4, 6, 8, 10, 12, 14, 16, 18, 20]
//}
@see Enumerator#with_object... -
Enumerator
# with _ object(obj) {|(*args) , memo _ obj| . . . } -> object (14401.0) -
繰り返しの各要素に obj を添えてブロックを繰り返し、obj を返り値として返します。
...の各要素に obj を添えてブロックを繰り返し、obj を返り値として返します。
obj には任意のオブジェクトを渡すことができます。
ブロックが渡されなかった場合は、上で説明した繰り返しを実行し、
最後に obj を返す Enumer......][ruby]{
# 0,1,2 と呼びだす enumeratorを作る
to_three = Enumerator.new do |y|
3.times do |x|
y << x
end
end
to_three_with_string = to_three.with_object("foo")
to_three_with_string.each do |x,string|
puts "#{string}: #{x}"
end
# => foo:0
# => foo:1
# => foo:2
//}
@param obj 繰り......返しの各要素に添えて渡されるオブジェクト
@see Enumerable#each_with_object... -
Module
# extend _ object(obj) -> object (14301.0) -
Object#extend の実体です。オブジェクトにモジュールの機能を追加します。
...Object#extend の実体です。オブジェクトにモジュールの機能を追加します。
Object#extend は、Ruby で書くと以下のように定義できます。
//emlist[例][ruby]{
def extend(*modules)
modules.reverse_each do |mod|
# extend_object や extended はプライ......で
# 直接 mod.extend_object(self) などとは書けない
mod.__send__(:extend_object, self)
mod.__send__(:extended, self)
end
end
//}
extend_object のデフォルトの実装では、self に定義されて
いるインスタンスメソッドを obj の特異メソッドとし......て追加します。
@param obj self の機能を追加するオブジェクトを指定します。
@return obj で指定されたオブジェクトを返します。
@see Module#extended... -
ARGF
. class # bytes { |byte| . . . } -> self (14201.0) -
このメソッドは obsolete です。 代わりに ARGF.class#each_byte を使用してください。 使用すると警告メッセージが表示されます。
...このメソッドは obsolete です。
代わりに ARGF.class#each_byte を使用してください。
使用すると警告メッセージが表示されます。... -
ARGF
. class # each _ byte { |byte| . . . } -> self (14201.0) -
ARGF の現在位置から 1 バイトずつ読み込み、それを整数として与え、ブロックを実行します。 ブロック引数byteは0..255のいずれかの整数です。
...込み、それを整数として与え、ブロックを実行します。
ブロック引数byteは0..255のいずれかの整数です。
このメソッドはスクリプトに指定した引数(Object::ARGV を参照) をファ
イル名とみなして、それらのファイルを連結した......現在位置の1バイトについてファイル名を得るには
ARGF.class#filename を使用します。
ブロックが与えられなかった場合は、Enumerator オブジェクトを生成して返します。
例:
ARGF.each_byte.to_a # => [35, 32, ... 95, 10]
@see IO#each_byte...