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検索結果
先頭5件
-
RubyVM
:: InstructionSequence . compile _ file(file , options = nil) -> RubyVM :: InstructionSequence (12302.0) -
引数 file で指定した Ruby のソースコードを元にコンパイル済みの RubyVM::InstructionSequence オブジェクトを作成して返します。
...file で指定した Ruby のソースコードを元にコンパイル済みの
RubyVM::InstructionSequence オブジェクトを作成して返します。
RubyVM::InstructionSequence.compile とは異なり、file、path などの
メタデータは自動的に取得します。
@param file......lse、Hash オブ
ジェクトのいずれかで指定します。詳細は
RubyVM::InstructionSequence.compile_option= を参照
してください。
# /tmp/hello.rb
puts "Hello, world!"
# irb
RubyVM::InstructionSequence.compile_file("/tmp/hel......lo.rb")
# => <RubyVM::InstructionSequence:<main>@/tmp/hello.rb>
@see RubyVM::InstructionSequence.compile... -
Class
# subclasses -> [Class] (9202.0) -
自身が直接のスーパークラスになっている(特異クラスを除く)クラスの配列を返します。 返り値の配列の順序は未定義です。
...を除く)クラスの配列を返します。
返り値の配列の順序は未定義です。
//emlist[例][ruby]{
class A; end
class B < A; end
class C < B; end
class D < A; end
A.subclasses # => [D, B]
B.subclasses # => [C]
C.subclasses # => []
//}
@see Class#superclass... -
Class
# superclass -> Class | nil (9202.0) -
自身のスーパークラスを返します。
...ます。
//emlist[例][ruby]{
File.superclass #=> IO
IO.superclass #=> Object
class Foo; end
class Bar < Foo; end
Bar.superclass #=> Foo
Object.superclass #=> BasicObject
//}
ただし BasicObject.superclass は nil を返します。
//emlist[例][ruby]{
Bas......icObject.superclass #=> nil
//}......icObject.superclass #=> nil
//}
@see Class#subclasses... -
Enumerable
# drop _ while {|element| . . . } -> Array (9202.0) -
ブロックを評価して最初に偽となった要素の手前の要素まで捨て、 残りの要素を配列として返します。
...価して最初に偽となった要素の手前の要素まで捨て、
残りの要素を配列として返します。
ブロックを指定しなかった場合は、Enumerator を返します。
//emlist[例][ruby]{
a = [1, 2, 3, 4, 5, 0]
a.drop_while {|i| i < 3 } # => [3, 4, 5, 0]
//}... -
Enumerable
# take _ while {|element| . . . } -> Array (9202.0) -
Enumerable オブジェクトの要素を順に偽になるまでブロックで評価します。 最初に偽になった要素の手前の要素までを配列として返します。
...Enumerable オブジェクトの要素を順に偽になるまでブロックで評価します。
最初に偽になった要素の手前の要素までを配列として返します。
//emlist[例][ruby]{
e = [1, 2, 3, 4, 5, 0].each
e.take_while {|i| i < 3 } # => [1, 2]
//}
ブロックを......省略した場合は Enumerator を返します。
@see Array#take_while... -
File
. delete(*filename) -> Integer (9202.0) -
ファイルを削除します。削除したファイルの数を返します。 削除に失敗した場合は例外 Errno::EXXX が発生します。
...ilename ファイル名を表す文字列を指定します。
@raise Errno::EXXX 失敗した場合に発生します。
//emlist[例][ruby]{
IO.write("test.txt", "test")
p File.exist?("test.txt") # => true
p File.delete("test.txt") # => 1
p File.exist?("test.txt") # => false
begin
File.del......ete("test.txt")
rescue
p $! # => #<Errno::ENOENT: No such file or directory @ unlink_internal - test.txt>
end
//}... -
FileTest
. # executable?(file) -> bool (9202.0) -
ファイルがカレントプロセスにより実行できる時に真を返しま す。そうでない場合、ファイルが存在しない場合、あるいはシステムコールに失敗した場合などには false を返します。
...合、ファイルが存在しない場合、あるいはシステムコールに失敗した場合などには false を返します。
@param file ファイル名を表す文字列を指定します。
例:
FileTest.executable?('/bin') # => true
FileTest.executable?('/bin/bash') # => true... -
FileTest
. # executable _ real?(file) -> bool (9202.0) -
ファイルがカレントプロセスの実ユーザか実グループで実行できる時に真を返します。そうでない場合、ファイルが存在しない場合、あるいはシステムコールに失敗した場合などには false を返します。
...どには false を返します。
@param file ファイル名を表す文字列を指定します。
//emlist[例][ruby]{
IO.write("empty.txt", "")
File.chmod(0744, "empty.txt")
FileTest.executable_real?("empty.txt") # => true
File.chmod(0644, "empty.txt")
FileTest.executable_real?("empty.tx......t") # => false
//}... -
FileTest
. # file?(file) -> bool (9202.0) -
ファイルが通常ファイルである時に真を返します。そうでない場合、ファイルが存在しない場合、あるいはシステムコールに失敗した場合などには false を返します。
...false を返します。
@param file ファイル名を表す文字列か IO オブジェクトを指定します。
@raise IOError 指定された IO オブジェクト file が既に close されていた場合に発生します。
例:
FileTest.file?('/bin/bash') # => true
FileTest.file?(......'/bin') # => false
FileTest.file?('/no_such_file') # => false... -
FileTest
. # readable?(file) -> bool (9202.0) -
ファイルがカレントプロセスにより読み込み可能な時に真を返します。そうでない場合、ファイルが存在しない場合、あるいはシステムコールに失敗した場合などには false を返します。
...は false を返します。
@param file ファイル名を表す文字列を指定します。
//emlist[例][ruby]{
IO.write("testfile", "")
File.chmod(0644, "testfile")
FileTest.readable?("testfile") # => true
File.chmod(0200, "testfile")
FileTest.readable?("testfile") # => false
//}...