Class: MethodFinder

Inherits:
Object show all
Defined in:
lib/methodfinder.rb

Constant Summary collapse

ARGS = 
{
  :cycle => [1] # prevent cycling forever
}
INSTANCE_METHOD_BLACKLIST =

Blacklisting methods, e.g. { :Object => [:ri, :vim] }

Hash.new { |h, k| h[k] = [] }
CLASS_METHOD_BLACKLIST = 
Hash.new { |h, k| h[k] = [] }

Class Method Summary collapse

Class Method Details

.find(obj, res, *args, &block) ⇒ Object 



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# File 'lib/methodfinder.rb', line 35

def find(obj, res, *args, &block)
  redirect_streams

  methods_to_try(obj).select do |met|
    o = obj.dup rescue obj
    m = o.method(met)
    if m.arity <= args.size
      a = args.empty? && ARGS.has_key?(met) ? ARGS[met] : args
      m.call(*a, &block) == res rescue nil
    end
  end
ensure
  restore_streams
end

.find_classes_and_modules ⇒ Object 



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# File 'lib/methodfinder.rb', line 62

def find_classes_and_modules
  constants = Object.constants.sort.map { |c| Object.const_get(c) }
  constants.select { |c| c.class == Class || c.class == Module}
end

.find_in_class_or_module(c, pattern = /./) ⇒ Object 



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# File 'lib/methodfinder.rb', line 67

def find_in_class_or_module(c, pattern=/./)
  cs = Object.const_get(c.to_s)
  class_methods = cs.methods(false) rescue []
  instance_methods = cs.instance_methods(false)
  all_methods = class_methods + instance_methods
  all_methods.grep(/#{pattern}/).sort
end

.methods_to_try(obj) ⇒ Object

Added by Jan Lelis



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# File 'lib/methodfinder.rb', line 51

def methods_to_try(obj)
  ret = obj.methods.map(&:intern)
  blacklist = obj.is_a?(Module) ? CLASS_METHOD_BLACKLIST : INSTANCE_METHOD_BLACKLIST
  klass = obj.is_a?(Module) ? obj : obj.class

  klass.ancestors.each { |ancestor| ret -= blacklist[ancestor.to_s.intern] }

  # 1.8.7 lacks Symbol#<=>
  ret.sort_by(&:to_s)
end