PLUSOR plusor

alias 和 alias_method 区别 ruby

1

class User

  def full_name

Ensures that the object/expression is true.

assert( boolean, [msg] )

Ensures that obj1 == obj2 is true.

assert_equal( obj1, obj2, [msg] )

异常信息(Exception Information)

                                     #传递给raise的异常对象.
$!                Exception          #The exception object passed to raise. [thread]
                                     #最后一个异常产生时的调用栈. 详见 Kernel#caller.
$@                Array              #The stack backtrace generated by the last exception. See Kernel#caller. [thread]

Class Name corresponds to

Module      included

db:create creates the database for the current env
db:create:all creates the databases for all envs
db:drop drops the database for the current env
db:drop:all drops the databases for all envs
db:migrate runs migrations for the current env that have not run yet
db:migrate:up runs one specific migration
db:migrate:down rolls back one specific migration
db:migrate:status shows current migration status
db:migrate:rollback rolls back the last migration
db:forward advances the current schema version to the next one

	class Area < ActiveRecord::Base
	acts_as_nested_set :counter_cache => :children_count
	#Area.rebot(省ID,[市ID])
	#Area.rebot(3198,[3213]) or Area.rebot(3198)
	scope :robot, ->(s,q=[]) { where("parent_id in (?)",q.or(select(:id).where(:parent_id => s))) }

	[:parent,:root,:province,:city,:district].each do \|instance\|
	class_eval <<-EOF,__FILE__,__LINE__ + 1
	delegate :name,:to => :#{instance} ,:allow_nil => true,:prefix => true
	#{next if [:parent].include?(instance)}

	class Hash
	# k = {}
	# k.create_deeps(*%w(1 2 3 4 5 6 7 8 9 10))
	# #=> {"1"=>{"2"=>{"3"=>{"4"=>{"5"=>{"6"=>{"7"=>{"8"=>{"9"=>"10"}}}}}}}}}
	def create_deeps(*args)
	self.replace deep_create(*args)
	end

	def deep_create(*args)
	dup.deep_create!(*args)

	class Foo
	include MagicEnum
	attr_accessor :status

	enum_attr :status, [ ["Open",0],["Close",1]]
	end

	foo = Foo.new
	foo.status = 1

	/(?<foo>regexp)/ =~ "regexp"

	foo # => "regexp"