Results for: "OptionParser"

When a block given, iterates backwards over the elements of self, passing, in reverse order, each element to the block; returns self:

a = []
[0, 1, 2].reverse_each {|element| a.push(element) }
a # => [2, 1, 0]

Allows the array to be modified during iteration:

a = ['a', 'b', 'c']
a.reverse_each {|element| a.clear if element.start_with?('b') }
a # => []

When no block given, returns a new Enumerator.

Related: see Methods for Iterating.

With a block given, calls the block with each repeated combination of length size of the elements of self; each combination is an array; returns self. The order of the combinations is indeterminate.

If a positive integer argument size is given, calls the block with each size-tuple repeated combination of the elements of self. The number of combinations is (size+1)(size+2)/2.

Examples:

• size is 1:

  c = []
  [0, 1, 2].repeated_combination(1) {|combination| c.push(combination) }
  c # => [[0], [1], [2]]
  

• size is 2:

  c = []
  [0, 1, 2].repeated_combination(2) {|combination| c.push(combination) }
  c # => [[0, 0], [0, 1], [0, 2], [1, 1], [1, 2], [2, 2]]
  

If size is zero, calls the block once with an empty array.

If size is negative, does not call the block:

[0, 1, 2].repeated_combination(-1) {|combination| fail 'Cannot happen' }

With no block given, returns a new Enumerator.

Related: see Methods for Combining.

Like backtrace, but returns each line of the execution stack as a Thread::Backtrace::Location. Accepts the same arguments as backtrace.

f = Fiber.new { Fiber.yield }
f.resume
loc = f.backtrace_locations.first
loc.label  #=> "yield"
loc.path   #=> "test.rb"
loc.lineno #=> 1

Returns the backtrace (the list of code locations that led to the exception), as an array of Thread::Backtrace::Location instances.

Example (assuming the code is stored in the file named t.rb):

def division(numerator, denominator)
  numerator / denominator
end

begin
  division(1, 0)
rescue => ex
  p ex.backtrace_locations
  # ["t.rb:2:in 'Integer#/'", "t.rb:2:in 'Object#division'", "t.rb:6:in '<main>'"]
  loc = ex.backtrace_locations.first
  p loc.class
  # Thread::Backtrace::Location
  p loc.path
  # "t.rb"
  p loc.lineno
  # 2
  p loc.label
  # "Integer#/"
end

The value returned by this method might be adjusted when raising (see Kernel#raise), or during intermediate handling by set_backtrace.

See also backtrace that provide the same value as an array of strings. (Note though that two values might not be consistent with each other when backtraces are manually adjusted.)

See Backtraces.

Creates module functions for the named methods. These functions may be called with the module as a receiver, and also become available as instance methods to classes that mix in the module. Module functions are copies of the original, and so may be changed independently. The instance-method versions are made private. If used with no arguments, subsequently defined methods become module functions. String arguments are converted to symbols. If a single argument is passed, it is returned. If no argument is passed, nil is returned. If multiple arguments are passed, the arguments are returned as an array.

module Mod
  def one
    "This is one"
  end
  module_function :one
end
class Cls
  include Mod
  def call_one
    one
  end
end
Mod.one     #=> "This is one"
c = Cls.new
c.call_one  #=> "This is one"
module Mod
  def one
    "This is the new one"
  end
end
Mod.one     #=> "This is one"
c.call_one  #=> "This is the new one"

Returns the fractional part of the day in range (Rational(0, 1)…Rational(1, 1)):

DateTime.new(2001,2,3,12).day_fraction # => (1/2)

With a block given, passes each element of self to the block in reverse order:

a = []
(1..4).reverse_each {|element| a.push(element) } # => 1..4
a # => [4, 3, 2, 1]

a = []
(1...4).reverse_each {|element| a.push(element) } # => 1...4
a # => [3, 2, 1]

With no block given, returns an enumerator.

Returns true if the set is a proper subset of the given set.

Returns the Ruby source filename and line number of the binding object.

Returns the Ruby source filename and line number containing this proc or nil if this proc was not defined in Ruby (i.e. native).

Returns the Ruby source filename and line number containing this method or nil if this method was not defined in Ruby (i.e. native).

Returns the Ruby source filename and line number containing this method or nil if this method was not defined in Ruby (i.e. native).

Returns the execution stack for the target thread—an array containing backtrace location objects.

See Thread::Backtrace::Location for more information.

This method behaves similarly to Kernel#caller_locations except it applies to a specific thread.

With a block given, calls the block with each element, but in reverse order; returns self:

a = []
(1..4).reverse_each {|element| a.push(-element) } # => 1..4
a # => [-4, -3, -2, -1]

a = []
%w[a b c d].reverse_each {|element| a.push(element) }
# => ["a", "b", "c", "d"]
a # => ["d", "c", "b", "a"]

a = []
h.reverse_each {|element| a.push(element) }
# => {:foo=>0, :bar=>1, :baz=>2}
a # => [[:baz, 2], [:bar, 1], [:foo, 0]]

With no block given, returns an Enumerator.

Returns the source file origin from the given object.

See ::trace_object_allocations for more information and examples.

Returns the original line from source for from the given object.

See ::trace_object_allocations for more information and examples.

Constant time memory comparison. Inputs are hashed using SHA-256 to mask the length of the secret. Returns true if the strings are identical, false otherwise.

Returns the convertible integer type of the given type. You may optionally specify additional headers to search in for the type. convertible means actually the same type, or typedef’d from the same type.

If the type is an integer type and the convertible type is found, the following macros are passed as preprocessor constants to the compiler using the type name, in uppercase.

• TYPEOF_, followed by the type name, followed by =X where “X” is the found convertible type name.

• TYP2NUM and NUM2TYP, where TYP is the type name in uppercase with replacing an _t suffix with “T”, followed by =X where “X” is the macro name to convert type to an Integer object, and vice versa.

For example, if foobar_t is defined as unsigned long, then convertible_int("foobar_t") would return “unsigned long”, and define these macros:

#define TYPEOF_FOOBAR_T unsigned long
#define FOOBART2NUM ULONG2NUM
#define NUM2FOOBART NUM2ULONG

in foo | bar

Add the –clear-sources option

Invoked by Ruby’s core methods to run a blocking operation in a non-blocking way.

Minimal suggested implementation is:

def blocking_operation_wait(work)
  Thread.new(&work).join
end

Add the –key option