a set of friendly files for determining your Ruby runtime treats cygwin as linux also treats IronRuby on mono as...linux
true for linux, false for windows, os x, cygwin
true for linux, os x, cygwin
provides easy way to see the relevant config entries
amount of memory the current process "is using", in RAM (doesn‘t include any swap memory that it may be using, just that in actual RAM) raises ‘unknown’ on jruby currently
true if on windows [and/or jruby] false if on linux or cygwin on windows
[Validate]