Question

鉴于任何物体,我可打电话到<代码>#public_methods,并查阅其将采用的所有方法。然而,我有时认为,迅速列出所有尚未继承的公共方法,即真正属于这一类别的一部分的 st脚。

I found in “

(Foo.public_methods - Object.public_methods).sort

I can filter out a lot of basic Ruby stuff. I d like to be able to filter everything that was inherited all the way up the chain. If I know the parent class I can filter using it, but I d like to come up with a generic command that could return an array of the uninherited public methods for any object.

Answer 1

见false for inherited debate of public_methods:

"hello".public_methods.include?(:dup) # => true
"hello".public_methods(false).include?(:dup) # => false

回答你的问题,但如果你知道的话,irb确实是自动完成的,那么容易获得公共方法清单(特别是如果你知道你所寻求的方法的开始)。仅打上标号;击中它两次,将列出所有可能性(包括继承的可能性),但:

> "nice".d<tab><tab>
"nice".delete      "nice".delete!    "nice".display   "nice".downcase                 
"nice".downcase!   "nice".dump       "nice".dup       "nice".define_singleton_method

> "nice".<tab><tab>
Display all 162 possibilities? (y or n)
...

使用 pry 更方便地了解按继承程度分列的现有方法:

[1] pry(main)> cd "nice"
[2] pry("nice"):1> ls
Comparable#methods: <  <=  >  >=  between?
String#methods: %  *  +  <<  <=>  ==  ===  =~  []  []=  ascii_only?  bytes  bytesize  byteslice  capitalize  capitalize!  casecmp  center  chars  chomp  chomp!  chop  chop!  chr  clear  codepoints  concat  count  crypt  delete  delete!  downcase  downcase!  dump  each_byte  each_char  each_codepoint  each_line  empty?  encode  encode!  encoding  end_with?  eql?  force_encoding  getbyte  gsub  gsub!  hash  hex  include?  index  insert  inspect  intern  length  lines  ljust  lstrip  lstrip!  match  next  next!  oct  ord  partition  prepend  replace  reverse  reverse!  rindex  rjust  rpartition  rstrip  rstrip!  scan  setbyte  shellescape  shellsplit  size  slice  slice!  split  squeeze  squeeze!  start_with?  strip  strip!  sub  sub!  succ  succ!  sum  swapcase  swapcase!  to_c  to_f  to_i  to_r  to_s  to_str  to_sym  tr  tr!  tr_s  tr_s!  unpack  upcase  upcase!  upto  valid_encoding?
locals: _  _dir_  _ex_  _file_  _in_  _out_  _pry_

Answer 2

查阅include_super? 是否还返还继承的方法。违约价值是真实的。

您可以采取以下措施:

class A 
  def method_1
     puts "method from A"
  end
end

class B < A
  def method_2
    puts "method from B"
  end
end

B.instance_methods        # => [:method_1, :method_2, ...]
B.instance_methods(false) # => [:method_2]

友情链接