Performs a Miller-Rabin probabilistic primality test for bn.
checks parameter is deprecated in version 3.0. It has no effect.
Write data to a registry value named name. When name is nil, write to the ‘default’ value.
type is type value. (see Registry::Constants module) Class of data must be same as which read method returns.
Write value to a registry value named name.
The value type is REG_SZ(write_s), REG_DWORD(write_i), or REG_BINARY(write_bin).
Write value to a registry value named name.
The value type is REG_SZ(write_s), REG_DWORD(write_i), or REG_BINARY(write_bin).
Same as IO.
Same as IO.
Same as IO.
Returns true if stat is writable by the effective user id of this process.
File.stat("testfile").writable? #=> true
Creates a new string of the given length and yields a zero-copy IO::Buffer instance to the block which uses the string as a source. The block is expected to write to the buffer and the string will be returned.
IO::Buffer.string(4) do |buffer| buffer.set_string("Ruby") end # => "Ruby"
If the buffer is private, meaning modifications to the buffer will not be replicated to the underlying file mapping.
# Create a test file: File.write('test.txt', 'test') # Create a private mapping from the given file. Note that the file here # is opened in read-only mode, but it doesn't matter due to the private # mapping: buffer = IO::Buffer.map(File.open('test.txt'), nil, 0, IO::Buffer::PRIVATE) # => #<IO::Buffer 0x00007fce63f11000+4 MAPPED PRIVATE> # Write to the buffer (invoking CoW of the underlying file buffer): buffer.set_string('b', 0) # => 1 # The file itself is not modified: File.read('test.txt') # => "test"
Write at least length bytes from the buffer starting at offset, into the io. If an error occurs, return -errno.
If length is not given or nil, it defaults to the size of the buffer minus the offset, i.e. the entire buffer.
If length is zero, exactly one write operation will occur.
If offset is not given, it defaults to zero, i.e. the beginning of the buffer.
out = File.open('output.txt', 'wb') IO::Buffer.for('1234567').write(out, 3)
This leads to 123 being written into output.txt
Write at least length bytes from the buffer starting at offset, into the io starting at the specified from position. If an error occurs, return -errno.
If length is not given or nil, it defaults to the size of the buffer minus the offset, i.e. the entire buffer.
If length is zero, exactly one pwrite operation will occur.
If offset is not given, it defaults to zero, i.e. the beginning of the buffer.
If the from position is beyond the end of the file, the gap will be filled with null (0 value) bytes.
out = File.open('output.txt', File::RDWR) # open for read/write, no truncation IO::Buffer.for('1234567').pwrite(out, 2, 3, 1)
This leads to 234 (3 bytes, starting from position 1) being written into output.txt, starting from file position 2.
Returns the value of the node as an IntegerNode or a FloatNode. This method is deprecated in favor of value or numerator/#denominator.
Mirrors the Method#parameters method.
Returns true if there were errors during parsing and false if there were not.
Look up the typeclass DNS resource of name.
name must be a Resolv::DNS::Name or a String.
typeclass should be one of the following:
Resolv::DNS::Resource::IN::ANY
Resolv::DNS::Resource::IN::CNAME
Resolv::DNS::Resource::IN::HINFO
Resolv::DNS::Resource::IN::MINFO
Resolv::DNS::Resource::IN::MX
Resolv::DNS::Resource::IN::NS
Resolv::DNS::Resource::IN::PTR
Resolv::DNS::Resource::IN::SOA
Resolv::DNS::Resource::IN::TXT
Returned resource is represented as a Resolv::DNS::Resource instance, i.e. Resolv::DNS::Resource::IN::A.
Looks up all typeclass DNS resources for name. See getresource for argument details.
Override to display a longer description of what this command does.