New Features


Even More Enhancement
    * New syntax and semantics
          o New syntax for lambdas
          o .() and calling Procs without #call/#[]
          o Multiple splats allowed
          o Mandatory arguments after optional arguments allowed
          o Arguments to #[]
          o printf-style formatted strings (%)
          o Newlines allowed before ternary colon
    * Kernel and Object
          o BasicObject
          o #instance_exec
          o Object#=~
          o Object#tap
          o Kernel#instance_variable_defined?
          o Kernel#define_singleton_method
          o Kernel#singleton_methods, Kernel#methods
    * Class and Module
          o Module#const_defined?, #const_get and #method_defined?
          o Module#class_variable_defined?
          o #class_variable_{set,get}
          o Class of singleton classes
          o #module_exec
    * Binding#eval
    * Blocks and Procs
          o Arity of blocks without arguments
          o proc is now a synonym of Proc.new
    * Blocks and Procs
          o Proc#yield
          o Passing blocks to #[]
          o Proc#lambda?
    * Enumerable and Enumerator
          o Enumerable methods called without a block
          o Enumerable#cycle
          o Enumerable#each_with_index
          o Enumerable#first(n)
          o Enumerable#group_by
          o Enumerable#find_index
          o Enumerable#take
          o Enumerable#drop
          o Enumerator#each
          o Enumerable#inject (#reduce) without a block
          o Enumerable#count
          o Enumerable#reduce
          o Enumerator#with_index
          o Enumerable##min_by, #max_by
          o Enumerable#zip
          o Enumerable#minmax and minmax_by
          o Enumerator#rewind
          o Enumerator#next
    * Regexp#match, String#match
          o Regexp#match, String#match
    * Fiber: coroutines/micro-threads
    * Array
          o Block argument to Array#index, Array#rindex
          o Array#combination
          o Array#permutation
          o Array#product
          o Array#pop, Array#shift
          o Array#to_s is equivalent to Array#inspect
          o Array.try_convert
    * Hash
          o preserving item insertion order
          o Hash#_compare_by_identity and Hash#compare_by_identity?
          o Hash.try_convert
    * Integer
          o Integer#odd?, #even?
          o Integer#pred
    * Method
          o Method#receiver
          o Method#name
          o Method#owner
    * Numeric
          o Numeric#upto, #downto, #times, #step
          o Numeric#scalar?, Complex#scalar?
          o Numeric#div
          o Numeric#fdiv
    * Range
          o Range#cover?
          o Range#include?
          o Range#min, Range#max
    * Regexp
          o Regexp#=== matches symbols
          o Regexp.try_convert
    * String
          o String#clear
          o String#each_char
          o String#ord
          o String#partition, #rpartition
          o String#lines
          o String#bytes
          o String#encoding
          o String#force_encoding
          o String#start_with?, #end_with?
          o String#unpack with a block
          o String#hash
          o String#upto
          o String.try_convert
    * Symbol
          o Zero-length symbols allowed
          o Symbol#=== matches strings
          o Symbol#intern
          o Symbol#encoding
          o Symbol methods similar to those in String
    * Math
          o Math#log and Math#log2
    * File and Dir operations
          o New methods
    * Process
          o Process.setrlimit
          o Process.daemon
          o Process.exec
    * Misc. new methods
          o GC.stress, GC.stress=
          o Method#hash, Proc#hash
          o __method__ and __callee__
          o Symbol#to_proc