Split a string based on change of character

[Peña, Botp]

From: Logan Capaldo [mailto:[email protected]]=20
# > Enumerator.new(s, :scan, /(.)\1*/).map {$&}
# What's wrong with s.enum_forscan, /(.)\1*/).map { $& } ?

somehow i missed the enumerator hack. thank you logan and brad for the =
update.
kind regards -botp

 

[Brad Phelan]

From: Logan Capaldo [mailto:[email protected]]
# > Enumerator.new(s, :scan, /(.)\1*/).map {$&}
# What's wrong with s.enum_forscan, /(.)\1*/).map { $& } ?

somehow i missed the enumerator hack. thank you logan and brad for the update.
kind regards -botp

Hey cool .. 'enum_for' exactly what I was looking for. I couldn't
understand why it didn't exist and it does. Scratch my suggestion
for 'enum_scan'.

B

 

[Brad Phelan]

From: Logan Capaldo [mailto:[email protected]] # On 8/13/07, Brad
# > Enumerator.new(s, :scan, /(.)\1*/).map {$&}
# What's wrong with s.enum_forscan, /(.)\1*/).map { $& } ?

somehow i missed the enumerator hack. thank you logan and brad for the
update.
kind regards -botp

Hey cool .. 'enum_for' exactly what I was looking for. I couldn't
understand why it didn't exist and it does. Scratch my suggestion
for 'enum_scan'.

B

Would it not be clearer if enum_for worked as

s.enum_for.scan(/(.)\1*/).map { $& }

Quickie


require 'enumerator'

module Enumerable
class Expr
def initialize( enum )
@enum = enum
end

def method_missing(name, *args)
@enum.enum_for_old(name, *args)
end
end

end

class Object
alias :enum_for_old :enum_for
def enum_for
Enumerable::Expr.new(self)
end
end


s = "aabbccvvvvfg dddd"
r = s.enum_for.scan(/(.)\1*/).map {$&}
puts r


(To be correct though a full implementation should use the BlankSlate
class and properly implement the original enum_for interface )

B