Results for: "to_proc"

UNIXSocket represents a UNIX domain stream client socket.

Raised when OLE processing failed.

EX:

obj = WIN32OLE.new("NonExistProgID")

raises the exception:

WIN32OLERuntimeError: unknown OLE server: `NonExistProgID'
    HRESULT error code:0x800401f3
      Invalid class string

Raised when an IO operation fails.

File.open("/etc/hosts") {|f| f << "example"}
  #=> IOError: not opened for writing

File.open("/etc/hosts") {|f| f.close; f.read }
  #=> IOError: closed stream

Note that some IO failures raise SystemCallErrors and these are not subclasses of IOError:

File.open("does/not/exist")
  #=> Errno::ENOENT: No such file or directory - does/not/exist

Raised by some IO operations when reaching the end of file. Many IO methods exist in two forms,

one that returns nil when the end of file is reached, the other raises EOFError.

EOFError is a subclass of IOError.

file = File.open("/etc/hosts")
file.read
file.gets     #=> nil
file.readline #=> EOFError: end of file reached

The set of all prime numbers.

Example

Prime.each(100) do |prime|
  p prime  #=> 2, 3, 5, 7, 11, ...., 97
end

Prime is Enumerable:

Prime.first 5 # => [2, 3, 5, 7, 11]

Retrieving the instance

For convenience, each instance method of Prime.instance can be accessed as a class method of Prime.

e.g.

Prime.instance.prime?(2)  #=> true
Prime.prime?(2)           #=> true

Generators

A “generator” provides an implementation of enumerating pseudo-prime numbers and it remembers the position of enumeration and upper bound. Furthermore, it is an external iterator of prime enumeration which is compatible with an Enumerator.

Prime::PseudoPrimeGenerator is the base class for generators. There are few implementations of generator.

Prime::EratosthenesGenerator

Uses eratosthenes’ sieve.

Prime::TrialDivisionGenerator

Uses the trial division method.

Prime::Generator23

Generates all positive integers which are not divisible by either 2 or 3. This sequence is very bad as a pseudo-prime sequence. But this is faster and uses much less memory than the other generators. So, it is suitable for factorizing an integer which is not large but has many prime factors. e.g. for Prime#prime? .

RDoc::Task creates the following rake tasks to generate and clean up RDoc output:

rdoc

Main task for this RDoc task.

clobber_rdoc

Delete all the rdoc files. This target is automatically added to the main clobber target.

rerdoc

Rebuild the rdoc files from scratch, even if they are not out of date.

Simple Example:

require 'rdoc/task'

RDoc::Task.new do |rdoc|
  rdoc.main = "README.rdoc"
  rdoc.rdoc_files.include("README.rdoc", "lib/**/*.rb")
end

The rdoc object passed to the block is an RDoc::Task object. See the attributes list for the RDoc::Task class for available customization options.

Specifying different task names

You may wish to give the task a different name, such as if you are generating two sets of documentation. For instance, if you want to have a development set of documentation including private methods:

require 'rdoc/task'

RDoc::Task.new :rdoc_dev do |rdoc|
  rdoc.main = "README.doc"
  rdoc.rdoc_files.include("README.rdoc", "lib/**/*.rb")
  rdoc.options << "--all"
end

The tasks would then be named :rdoc_dev, :clobber_rdoc_dev, and :rerdoc_dev.

If you wish to have completely different task names, then pass a Hash as first argument. With the :rdoc, :clobber_rdoc and :rerdoc options, you can customize the task names to your liking.

For example:

require 'rdoc/task'

RDoc::Task.new(:rdoc => "rdoc", :clobber_rdoc => "rdoc:clean",
               :rerdoc => "rdoc:force")

This will create the tasks :rdoc, :rdoc:clean and :rdoc:force.

A class that provides two-phase lock with a counter. See Sync_m for details.

A class that provides two-phase lock with a counter. See Sync_m for details.

Raised when attempting to convert special float values (in particular infinite or NaN) to numerical classes which don’t support them.

Float::INFINITY.to_r
#=> FloatDomainError: Infinity

Raised in case of a stack overflow.

def me_myself_and_i
  me_myself_and_i
end
me_myself_and_i

raises the exception:

SystemStackError: stack level too deep

Raised when given an invalid regexp expression.

Regexp.new("?")

raises the exception:

RegexpError: target of repeat operator is not specified: /?/

ThreadGroup provides a means of keeping track of a number of threads as a group.

A given Thread object can only belong to one ThreadGroup at a time; adding a thread to a new group will remove it from any previous group.

Newly created threads belong to the same group as the thread from which they were created.

Raised when an invalid operation is attempted on a thread.

For example, when no other thread has been started:

Thread.stop

This will raises the following exception:

ThreadError: stopping only thread
note: use sleep to stop forever

A module that provides a two-phase lock with a counter.

A module that provides a two-phase lock with a counter.

See the OpenSSL documentation for PEM_write_bio_ECPKParameters()

See the OpenSSL documentation for i2d_ECPKParameters_bio()

See the OpenSSL documentation for ECPKParameters_print()

See the OpenSSL documentation for EC_POINT_point2bn()