Same as Dir.rmdir
, except multiple directories are allowed.
Is code
a redirection status?
Is code
a redirection status?
Quietly ensure the Gem directory dir
contains all the proper subdirectories. If we can’t create a directory due to a permission problem, then we will silently continue.
If mode
is given, missing directories are created with this mode.
World-writable directories will never be created.
Paths where RubyGems’ .rb files and bin files are installed
Calls the block once for each [key, value] pair in the database. Returns self.
Yields the name and value of each struct member in order. If no block is given an enumerator is returned.
Customer = Struct.new(:name, :address, :zip) joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345) joe.each_pair {|name, value| puts("#{name} => #{value}") }
Produces:
name => Joe Smith address => 123 Maple, Anytown NC zip => 12345
Executes block for each key in the database, passing the key and the corresponding value as a parameter.
Yields all attributes (as symbols) along with the corresponding values or returns an enumerator if no block is given.
require "ostruct" data = OpenStruct.new("country" => "Australia", :capital => "Canberra") data.each_pair.to_a # => [[:country, "Australia"], [:capital, "Canberra"]]
Iterates over each key-value pair in the database.
If no block is given, returns an Enumerator
.
Calls block once for each key in hsh, passing the key-value pair as parameters.
If no block is given, an enumerator is returned instead.
h = { "a" => 100, "b" => 200 } h.each {|key, value| puts "#{key} is #{value}" }
produces:
a is 100 b is 200
Yields each environment variable name
and value
.
If no block is given an Enumerator
is returned.
Returns an array with bindir attached to each executable in the executables
list
creates a temporary directory with hax TODO: deprecate and remove
Redirects to url
with a WEBrick::HTTPStatus::Redirect
status
.
Example:
res.set_redirect WEBrick::HTTPStatus::TemporaryRedirect
Quietly ensure the Gem directory dir
contains all the proper subdirectories for handling default gems. If we can’t create a directory due to a permission problem, then we will silently continue.
If mode
is given, missing directories are created with this mode.
World-writable directories will never be created.
Returns the first element, or the first n
elements, of the array. If the array is empty, the first form returns nil
, and the second form returns an empty array. See also Array#last
for the opposite effect.
a = [ "q", "r", "s", "t" ] a.first #=> "q" a.first(2) #=> ["q", "r"]
Array
Difference
Returns a new array that is a copy of the receiver, removing any items that also appear in any of the arrays given as arguments. The order is preserved from the original array.
It compares elements using their hash
and eql?
methods for efficiency.
[ 1, 1, 2, 2, 3, 3, 4, 5 ].difference([ 1, 2, 4 ]) #=> [ 3, 3, 5 ] [ 1, 'c', :s, 'yep' ].difference([ 1 ], [ 'a', 'c' ]) #=> [ :s, "yep" ]
If you need set-like behavior, see the library class Set
.
See also Array#-
.
Extracts the nested value specified by the sequence of idx objects by calling dig
at each step, returning nil
if any intermediate step is nil
.
a = [[1, [2, 3]]] a.dig(0, 1, 1) #=> 3 a.dig(1, 2, 3) #=> nil a.dig(0, 0, 0) #=> TypeError: Integer does not have #dig method [42, {foo: :bar}].dig(1, :foo) #=> :bar
Returns a Digest
subclass by name
in a thread-safe manner even when on-demand loading is involved.
require 'digest' Digest("MD5") # => Digest::MD5 Digest(:SHA256) # => Digest::SHA256 Digest(:Foo) # => LoadError: library not found for class Digest::Foo -- digest/foo
Prints obj on the given port (default $>
). Equivalent to:
def display(port=$>) port.write self nil end
For example:
1.display "cat".display [ 4, 5, 6 ].display puts
produces:
1cat[4, 5, 6]
Performs integer division: returns the integer result of dividing int
by numeric
.
Returns the floating point result of dividing int
by numeric
.
654321.fdiv(13731) #=> 47.652829364212366 654321.fdiv(13731.24) #=> 47.65199646936475 -654321.fdiv(13731) #=> -47.652829364212366