Remove_const does not play nice with require

Ruby
1

$ ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.2.0]

Step 1

irb(main):002:0> require ‘ostruct’
=> true

Step 2

irb(main):005:0* Object.send(:remove_const, :OpenStruct)
=> OpenStruct

Step 3

ensure that OpenStruct is truly removed

irb(main):006:0> Object.send(:remove_const, :OpenStruct)
NameError: constant Object::OpenStruct not defined
from (irb):6:in remove_const' from (irb):6:insend’
from (irb):6

Step 4

irb(main):007:0> require ‘ostruct’
=> false

Step 5

irb(main):009:0> OpenStruct.new
NameError: uninitialized constant OpenStruct
from (irb):9

Questions:

  1. OpenStuct constant was removed in step2. Why the return value of
    require in step 4 is “false” ?

  2. require was done in step 4 then why OpenStruct is not available and
    why did step 5 fail ?

2

On May 12, 2010, at 1:31 PM, Raj S. wrote:

  1. OpenStuct constant was removed in step2. Why the return value of
    require in step 4 is “false” ?

require consults $LOADED_FEATURES.

  1. require was done in step 4 then why OpenStruct is not available and
    why did step 5 fail ?

Because “ostruct” is already on $LOADED_FEATURES.

~ j.