Serialization/Deserialization ruby object in YAML -

-

i'm trying understand serialization/deserialization of ruby object using yaml under 1.8.7 , 1.9+ , have few queries regarding (i can't find documentation on this)

ruby 1.8.7

class element     yaml_as "tag:ruby.yaml.org,2002:element"      def self.yaml_new(klass, tag, val)       puts "print in yaml"     end   end     yaml.parser   => syck     ## parser set syck         e =  element.new.to_yaml    => "--- !ruby/element {}\n\n"

question 1: why didn't tag:ruby.yaml.org,2002:element instead of --- !ruby/element {}\n\n ?

  yaml.load(e)    =>  print in "yaml" ##print statement execute     ## not sure change parser in 1.8 `pysch` skipping part

ruby 1.9+

  yaml::engine.yamler    => pysch     e =  element.new.to_yaml      => "--- !<tag:ruby.yaml.org,2002:element> {}\n"  ## see tag in 1.9+ fine

question 2 : why working in 1.9+ , not in 1.8.7 ?

   yaml.load(e)    =>    ## print not getting printed

question 3: why print in yaml isn't getting printed? in other words, why self.yaml_new not getting invoked on yaml.load? not supported under 1.9+ ?

   yaml::engine.yamler = 'syck'    => syck    u =  element.new.to_yaml    => "--- !ruby/object:element {}\n\n"

question 4 (similar question #1) : why the tag(tag:ruby.yaml.org,2002:element) missing in serialize yaml above

   yaml.load(e)    =>  ## suprisingly, print not executed

question 5 (similar question #2): why isn't self.yaml_new getting executed syck , pysch parser in ruby 1.9+ ?

can can me resolve these questions?

  • question 1: don't have answer one
  • question 2: because psych handles correctly should use yaml_tag instead of yaml_tag
  • question 3: use def yaml_initialize(tag, val) , work
  • question 4: because it's syck again, behaves in ruby 1.8
  • question 5: same q4

Comments

Post a Comment

Popular posts from this blog

Using 'OR' and 'AND' in SQL Server -

-
is using ( condition or condition b , condition c ) the same as ( condition , condition c) or (condition b , condition c) no. first condition is: (condition a) or (condition b , condition c) and second is: (condition , condition c) or (condition b , condition c) you can see difference between them.
Read more

python - Finding intersection between ellipse and a line -

-
i trying find intersection points between elipse , line, seem unable so. have tried 2 approaches, 1 shapely trying find intersection between linestring , linearring in code bellow, did not usable values out of it. 1 of problems, elipse off center , @ small or high angle # -*- coding: utf-8 -*- """ created on mon aug 19 17:38:55 2013 @author: adudchenko """ pylab import * import numpy np shapely.geometry.polygon import linearring shapely.geometry import linestring def ellipse_polyline(ellipses, n=100): t = np.linspace(0, 2*np.pi, n, endpoint=false) st = np.sin(t) ct = np.cos(t) result = [] x0, y0, a, b, angle in ellipses: angle = np.deg2rad(angle) sa = np.sin(angle) ca = np.cos(angle) p = np.empty((n, 2)) p[:, 0] = x0 + * ca * ct - b * sa * st p[:, 1] = y0 + * sa * ct + b * ca * st result.append(p) return result def intersections(a, line): ea = linearring(a) eb...
Read more

c++ - NetBeans Remote Development with additional configuration -

-
i'm trying use netbeans (7.3.1) work on remote project. my configuration following: my local machine windows 7 laptop. doesn't have tools. in particular neither compiler nor debugger. have netbeans ide , putty example. source code, make scripts , (eventually) build results located on remote storage shared across servers , "locals". (i might switch single server storage faster don't think matters @ all.) i'm accessing using sshfs manager . sshfs manager takes server name, path on server, user name , ssh private key. in result mounts directory on server disk on windows. works fine. (although directories, possibly links, represented files in windows explorer, don't know if matters...) netbeans project located on local machine don't think matters , place remotely well. prefer keep "off source" don't have add ignores version control. in netbeans did procedure described in remote developement tutorial . seems successful. netbeans c...
Read more