Ruby's standard objects

[Stephan Kämper]

Hi group,

as I'm (kind of) browsing ObjectSpace I wonder if there's a way to
dynamically collect a list of the names of the standard objects and
global constants of Ruby (you know STDOUT, ARGV, DATA, RUBY_VERSION etc.)?

Is there a way to get these names? (And if so how would you suggest to
collect it?)

Happy rubying

Stephan

 

[Peter]

Hi group,

as I'm (kind of) browsing ObjectSpace I wonder if there's a way to
dynamically collect a list of the names of the standard objects and
global constants of Ruby (you know STDOUT, ARGV, DATA, RUBY_VERSION etc.)?

Is there a way to get these names? (And if so how would you suggest to
collect it?)

Do you mean this?

irb(main):001:0> Object.constants
=> ["TRUE", "SystemStackError", "RubyLex", "MatchData", "StandardError",
"ThreadError", "Float", "Tempfile", "SimpleDelegater", "RuntimeError",
"RUBY_RELEASE_DATE", "SimpleDelegator", "Continuation", "STDERR",
"Enumerable", "Object", "ObjectSpace", "NameError", "Errno", "Data",
"Process", "SignalException", "LoadError", "TOPLEVEL_BINDING", "Time",
"UnboundMethod", "Kernel", "IndexError", "NilClass", "STDIN",
"Comparable", "File", "Fixnum", "EOFError", "SystemCallError", "Dir",
"FloatDomainError", "ThreadGroup", "Class", "Precision", "ScriptError",
"RELEASE_DATE", "Symbol", "ARGV", "FalseClass", "Proc", "MatchingData",
"Readline", "GC", "TypeError", "String", "Thread", "SecurityError", "ENV",
"Binding", "NoMethodError", "RUBY_PLATFORM", "Delegator", "Regexp",
"Interrupt", "Integer", "SLex", "TrueClass", "NotImplementedError", "IO",
"Delegater", "Bignum", "Range", "RangeError", "STDOUT", "RUBY_VERSION",
"IRB", "RegexpError", "Numeric", "Hash", "Exception2MessageMapper",
"RubyToken", "Kconv", "SyntaxError", "Exception", "Signal", "PLATFORM",
"FALSE", "Array", "ArgumentError", "FileTest", "Struct",
"ZeroDivisionError", "NoMemoryError", "SystemExit", "IOError",
"LocalJumpError", "Math", "Marshal", "ARGF", "NIL", "Module", "Method",
"VERSION"]

Peter

 

[Stephan Kämper]

Hi Peter,

Do you mean this?

irb(main):001:0> Object.constants
=> ["TRUE", "SystemStackError", "RubyLex", "MatchData", "StandardError",

....snipped some constant names...

"VERSION"]

Yes, that's exactly what I meant. Thanks a lot.
Amazing, I'm surprised again just _how_ easy things are with Ruby.
Actually, I admit that this time I'm surprised by the principle of the
least surprise (which might not be as paradox as it seems at first
sight). Matz, thanks for this language.

Happy rubying

Stephan

 

[Robert Klemme]

Hi Peter,

Do you mean this?

irb(main):001:0> Object.constants
=> ["TRUE", "SystemStackError", "RubyLex", "MatchData",

"StandardError",
...snipped some constant names...

"VERSION"]

Yes, that's exactly what I meant. Thanks a lot.
Amazing, I'm surprised again just _how_ easy things are with Ruby.
Actually, I admit that this time I'm surprised by the principle of the
least surprise (which might not be as paradox as it seems at first
sight). Matz, thanks for this language.

Additonally there is

irb(main):001:0> global_variables
=> ["$-w", "$stderr", "$LOAD_PATH", "$<", "$-0", "$+", "$-p", "$$", "$-i",
"$deferr", "$~", "$!", "$-v", "$stdout", "$_", "$-K", "$-F", "$SAFE",
"$*", "$-I", "$/", "$'", "$-d", "$FILENAME", "$defout", "$@", "$VERBOSE",
"$stdin", "$.", "$KCODE", "$;", "$binding", "$0", "$:", "$,", "$`",
"$DEBUG", "$>", "$-a", "$\"", "$\\", "$=", "$-l", "$?", "$&"]

Regards

robert