豁然开朗，感谢分享

写的太好了，已经打赏支持，希望楼主一直能保持钻研的热情

你需要谷歌搜索，比如 Ruby pagination

并没有啊，《Ruby 元编程》里面就把这叫做扁平作用域（flat scope）。

我例子给的不太好，这里面的symbol似乎都是Ripper::EVENTS里的，我想最好能有对这些Events的文档（类似于表格），而且一个一个查的话也不全能找到。

Ripper::EVENTS
[:BEGIN, :END, :alias, :alias_error, :aref, :aref_field,
 :arg_ambiguous, :arg_paren, :args_add, :args_add_block, :args_add_star,
 :args_new, :array, :assign, :assign_error, :assoc_new,
 :assoclist_from_args, :bare_assoc_hash, :begin, :binary, :block_var,
 :block_var_add_block, :block_var_add_star, :blockarg, :bodystmt,
 :brace_block, :break, :call, :case, :class, :class_name_error, :command,
 :command_call, :const_path_field, :const_path_ref, :const_ref, :def,
 :defined, :defs, :do_block, :dot2, :dot3, :dyna_symbol, :else, :elsif,
 :ensure, :excessed_comma, :fcall, :field, :for, :hash, :if, :if_mod,
 :ifop, :lambda, :magic_comment, :massign, :method_add_arg,
 :method_add_block, :mlhs_add, :mlhs_add_star, :mlhs_new, :mlhs_paren,
 :module, :mrhs_add, :mrhs_add_star, :mrhs_new, :mrhs_new_from_args,
 :next, :opassign, :operator_ambiguous, :param_error, :params, :paren,
 :parse_error, :program, :qwords_add, :qwords_new, :redo, :regexp_add,
 :regexp_literal, :regexp_new, :rescue, :rescue_mod, :rest_param, :retry,
 :return, :return0, :sclass, :stmts_add, :stmts_new, :string_add,
 :string_concat, :string_content, :string_dvar, :string_embexpr,
 :string_literal, :super, :symbol, :symbol_literal, :top_const_field,
 :top_const_ref, :unary, :undef, :unless, :unless_mod, :until, :until_mod,
 :var_alias, :var_field, :var_ref, :void_stmt, :when, :while, :while_mod,
 :word_add, :word_new, :words_add, :words_new, :xstring_add,
 :xstring_literal, :xstring_new, :yield, :yield0, :zsuper, :CHAR,
 :__end__, :backref, :backtick, :comma, :comment, :const, :`cvar, :embdoc,
 :embdoc_beg, :embdoc_end, :embexpr_beg, :embexpr_end, :embvar, :float,
 :gvar, :heredoc_beg, :heredoc_end, :ident, :ignored_nl, :int, :ivar, :kw,
 :label, :lbrace, :lbracket, :lparen, :nl, :op, :period, :qwords_beg,
 :rbrace, :rbracket, :regexp_beg, :regexp_end, :rparen, :semicolon, :sp,
 :symbeg, :tlambda, :tlambeg, :tstring_beg, :tstring_content,
 :tstring_end, :words_beg, :words_sep]
``

• 1 🙋 🙋

非常酷，感谢分享

可以用 lambda

change = lambda do
  num = [1]
end
change.call

官方文档已经讲了很清楚了

new(size=0, default=nil) new(array) new(size) {|index| block }

In the first form, if no arguments are sent, the new array will be empty. When a size and an optional default are sent, an array is created with size copies of default. Take notice that all elements will reference the same object default.

Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live

Manjaro + gnome