Moves tuple
to port
.
What does this dependency require?
Lists the external (to RubyGems) requirements that must be met for this gem to work. It’s simply information for the user.
Usage:
spec.requirements << 'libmagick, v6.0' spec.requirements << 'A good graphics card'
Set
requirements to req
, ensuring it is an array.
Is remote fetching enabled?
Returns a new Array with the elements of self
in reverse order.
a = ['foo', 'bar', 'two'] a1 = a.reverse a1 # => ["two", "bar", "foo"]
Reverses self
in place:
a = ['foo', 'bar', 'two'] a.reverse! # => ["two", "bar", "foo"]
Returns the remainder after dividing self
by other
.
Examples:
11.remainder(4) # => 3 11.remainder(-4) # => 3 -11.remainder(4) # => -3 -11.remainder(-4) # => -3 12.remainder(4) # => 0 12.remainder(-4) # => 0 -12.remainder(4) # => 0 -12.remainder(-4) # => 0 13.remainder(4.0) # => 1.0 13.remainder(Rational(4, 1)) # => (1/1)
Returns the remainder after dividing self
by other
.
Of the Core and Standard Library classes, only Float
and Rational
use this implementation.
Examples:
11.0.remainder(4) # => 3.0 11.0.remainder(-4) # => 3.0 -11.0.remainder(4) # => -3.0 -11.0.remainder(-4) # => -3.0 12.0.remainder(4) # => 0.0 12.0.remainder(-4) # => 0.0 -12.0.remainder(4) # => -0.0 -12.0.remainder(-4) # => -0.0 13.0.remainder(4.0) # => 1.0 13.0.remainder(Rational(4, 1)) # => 1.0 Rational(13, 1).remainder(4) # => (1/1) Rational(13, 1).remainder(-4) # => (1/1) Rational(-13, 1).remainder(4) # => (-1/1) Rational(-13, 1).remainder(-4) # => (-1/1)
Returns a new string with the characters from self
in reverse order.
'stressed'.reverse # => "desserts"
Returns self
with its characters reversed:
s = 'stressed' s.reverse! # => "desserts" s # => "desserts"
Return the receiver associated with this KeyError
exception.
Return the receiver associated with this NameError
exception.
Return the receiver associated with this FrozenError
exception.
Returns the remainder from dividing by the value.
x.remainder(y) means x-y*(x/y).truncate
The opposite of Pathname#absolute?
It returns false
if the pathname begins with a slash.
p = Pathname.new('/im/sure') p.relative? #=> false p = Pathname.new('not/so/sure') p.relative? #=> true
Returns a string for DNS reverse lookup. It returns a string in RFC3172 form for an IPv6 address.
Returns the bound receiver of the binding object.
Returns the bound receiver of the method object.
(1..3).method(:map).receiver # => 1..3
Receive an incoming message from the current Ractor’s incoming port’s queue, which was sent there by send
.
r = Ractor.new do v1 = Ractor.receive puts "Received: #{v1}" end r.send('message1') r.take # Here will be printed: "Received: message1"
Alternatively, private instance method receive
may be used:
r = Ractor.new do v1 = receive puts "Received: #{v1}" end r.send('message1') r.take # Here will be printed: "Received: message1"
The method blocks if the queue is empty.
r = Ractor.new do puts "Before first receive" v1 = Ractor.receive puts "Received: #{v1}" v2 = Ractor.receive puts "Received: #{v2}" end wait puts "Still not received" r.send('message1') wait puts "Still received only one" r.send('message2') r.take
Output:
Before first receive Still not received Received: message1 Still received only one Received: message2
If close_incoming
was called on the ractor, the method raises Ractor::ClosedError
if there are no more messages in incoming queue:
Ractor.new do close_incoming receive end wait # in `receive': The incoming port is already closed => #<Ractor:#2 test.rb:1 running> (Ractor::ClosedError)
same as Ractor.receive
Loads the given name
, returning true
if successful and false
if the feature is already loaded.
If the filename neither resolves to an absolute path nor starts with ‘./’ or ‘../’, the file will be searched for in the library directories listed in $LOAD_PATH
($:
). If the filename starts with ‘./’ or ‘../’, resolution is based on Dir.pwd
.
If the filename has the extension “.rb”, it is loaded as a source file; if the extension is “.so”, “.o”, or “.dll”, or the default shared library extension on the current platform, Ruby loads the shared library as a Ruby extension. Otherwise, Ruby tries adding “.rb”, “.so”, and so on to the name until found. If the file named cannot be found, a LoadError
will be raised.
For Ruby extensions the filename given may use any shared library extension. For example, on Linux the socket extension is “socket.so” and require 'socket.dll'
will load the socket extension.
The absolute path of the loaded file is added to $LOADED_FEATURES
($"
). A file will not be loaded again if its path already appears in $"
. For example, require 'a'; require './a'
will not load a.rb
again.
require "my-library.rb" require "db-driver"
Any constants or globals within the loaded source file will be available in the calling program’s global namespace. However, local variables will not be propagated to the loading environment.
Refresh available gems from disk.