Module: AwesomeMethodArray
- Defined in:
- lib/amazing_print/core_ext/awesome_method_array.rb
Overview
Copyright © 2010-2016 Michael Dvorkin and contributors
AmazingPrint is freely distributable under the terms of MIT license. See LICENSE file or www.opensource.org/licenses/mit-license.php
The following makes it possible to invoke amazing_print while performing operations on method arrays, ex:
ap [].methods - Object.methods
ap ''.methods.grep(/!|\?/)
If you could think of a better way please let me know :-)
Instance Method Summary collapse
- #&(other) ⇒ Object
-
#-(other) ⇒ Object
:nodoc:.
-
#grep(pattern, &blk) ⇒ Object
Intercepting Array#grep needs a special treatment since grep accepts an optional block.
Instance Method Details
#&(other) ⇒ Object
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# File 'lib/amazing_print/core_ext/awesome_method_array.rb', line 24 def &(other) super.tap do |arr| arr.instance_variable_set(:@__awesome_methods__, instance_variable_get(:@__awesome_methods__)) end end |
#-(other) ⇒ Object
:nodoc:
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# File 'lib/amazing_print/core_ext/awesome_method_array.rb', line 18 def -(other) super.tap do |arr| arr.instance_variable_set(:@__awesome_methods__, instance_variable_get(:@__awesome_methods__)) end end |
#grep(pattern, &blk) ⇒ Object
Intercepting Array#grep needs a special treatment since grep accepts an optional block.
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# File 'lib/amazing_print/core_ext/awesome_method_array.rb', line 34 def grep(pattern, &blk) # # The following looks rather insane and I've sent numerous hours trying # to figure it out. The problem is that if grep gets called with the # block, for example: # # [].methods.grep(/(.+?)_by/) { $1.to_sym } # # ...then simple: # # original_grep(pattern, &blk) # # doesn't set $1 within the grep block which causes nil.to_sym failure. # The workaround below has been tested with Ruby 1.8.7/Rails 2.3.8 and # Ruby 1.9.2/Rails 3.0.0. For more info see the following thread dating # back to 2003 when Ruby 1.8.0 was as fresh off the grill as Ruby 1.9.2 # is in 2010 :-) # # http://www.justskins.com/forums/bug-when-rerouting-string-52852.html # # BTW, if you figure out a better way of intercepting Array#grep please # let me know: twitter.com/mid -- or just say hi so I know you've read # the comment :-) # arr = if blk super(pattern) do |match| # # The binding can only be used with Ruby-defined methods, therefore # we must rescue potential "ArgumentError: Can't create Binding from # C level Proc" error. # # For example, the following raises ArgumentError since #succ method # is defined in C. # # [ 0, 1, 2, 3, 4 ].grep(1..2, &:succ) # begin eval("%Q/#{match.to_s.gsub('/', '\/')}/ =~ #{pattern.inspect}", blk.binding, __FILE__, __LINE__) rescue StandardError ArgumentError end yield match end else super(pattern) end arr.instance_variable_set(:@__awesome_methods__, instance_variable_get(:@__awesome_methods__)) arr.select! { |item| item.is_a?(Symbol) || item.is_a?(String) } # grep block might return crap. arr end |