Perl 6 provides introspection - that's the ability for its object to be able to report on methods, attributes and inheritances.

And if you run Perl6 without an input file, it goes into a read - interpret - run cycle with each line you type in, rather like Python, Ruby and Tcl do. So we can experiment easily with that introspection.

  WomanWithCat:jan16 grahamellis$ perl6
  > "...".^methods
  (BUILD Int Num chomp chop pred succ simplematch match ords samecase
  samemark samespace word-by-word trim-leading trim-trailing trim
  encode NFC NFD NFKC NFKD wordcase trans indent codes chars uc
  lc tc fc tclc flip ord WHY WHICH Bool Str Stringy DUMP ACCEPTS
  Numeric gist perl comb subst-mutate subst lines split words)
  >

  WomanWithCat:jan16 grahamellis$ perl6
  > my $v = 4;
  4
  > $v.^methods
  (Int Num Rat FatRat abs Bridge chr sqrt base polymod expmod is-prime
  floor ceiling round lsb msb narrow Range sign sin tan cotan acosech
  conj atan2 cosec pred asec acotan cosh acos acosec sech unpolar
  log10 atanh log exp acosh truncate sinh tanh acotanh Real sec
  isNaN succ rand asin cos cis cosech asech roots Complex cotanh
  asinh atan WHICH new perl Bool Str gist ACCEPTS DUMP Numeric)
  >
(written 2016-01-02)

 P301 - Variables in Perl
  [975] Answering ALL the delegate's Perl questions - (2006-12-09)
  [1581] What is an lvalue? (Perl, C) - (2008-03-18)
  [1946] Variable Types in Perl - (2008-12-15)
  [2241] Perl references - $$var and \$var notations - (2009-06-15)
  [2374] Lead characters on Perl variable names - (2009-08-24)
  [2877] Further more advanced Perl examples - (2010-07-19)
  [2972] Some more advanced Perl examples from a recent course - (2010-09-27)
  [3059] Object Orientation in an hour and other Perl Lectures - (2010-11-18)
  [3430] Sigils - the characters on the start of variable names in Perl, Ruby and Fortran - (2011-09-10)
  [4398] Accessing variables across subroutine boundaries - Perl, Python, Java and Tcl - (2015-01-18)

P600 - Perl 6
  [582] DWIM and AWWO - (2006-01-30)
  [2816] Intelligent Matching in Perl - (2010-06-18)
  [4604] Perl - version 6 - official version launched at Christmas - (2016-01-02)
  [4605] Hello World - in Perl 6 - (2016-01-02)
  [4606] Using Perl 6 to analyse and report on data - (2016-01-02)
  [4607] Classes and object - first steps in Perl 6 - (2016-01-02)
  [4609] Mapping an array / list without a loop - how to do it in Perl 6 - (2016-01-03)
  [4610] Sorting by key or by comparator - Perl 6 - (2016-01-03)
  [4611] Hungarian, Camel, Snake and Kebab - variable naming conventions - (2016-01-03)
  [4620] Perl 6 - a Practical Extraction and Reporting example! - (2016-01-11)

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Introspecion in Perl 6
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