Class: Sequence::OfHash

Inherits:
OfArray show all
Defined in:
lib/sequence/ofhash.rb

Constant Summary

Constants inherited from Sequence

SubSequence, VERSION

Instance Attribute Summary

Attributes inherited from Indexed

#data, #pos

Instance Method Summary collapse

Methods inherited from OfArray

#append, #index, #new_data, #rindex

Methods included from ArrayLike

#data_class, #index, #like, #push, #rindex, #scan, #scan_until, #scanback, #scanback_until, #unshift

Methods inherited from Indexed

_orig_new, #_pos=, #eof?, #maxmatchlen, #maxmatchlen=, new, #new_data

Methods inherited from UseData

#read, #readahead, #readback, #readbehind, #size

Constructor Details

#initialize(hash, exceptions = [], include_default = false, modifiable = false) ⇒ OfHash

Returns a new instance of OfHash.



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# File 'lib/sequence/ofhash.rb', line 8

def initialize(hash,exceptions=[],include_default=false,modifiable=false)
  @hash=hash
  hash=hash.dup
  exceptions.each{|exc| hash.delete exc }
  @data=hash.inject([]){|l,pair| l+pair}
  @data<<hash.default if include_default
  @data.freeze unless modifiable
end

Instance Method Details

#modify(*args) ⇒ Object 



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# File 'lib/sequence/ofhash.rb', line 17

def modify(*args)
  repldata=args.pop
  start,len,only1=_parse_slice_args(*args)
  len==1 or raise "scalar modifications to hashes only!"
  if @data.size.%(2).nonzero? and @data.size.-(1)==start
    @hash.default=repldata.first
  elsif start.%(2).zero? #key 
    @hash[repldata.first]=@hash.delete @data[start]
  else #value
    @hash[@data[start-1]]=repldata.first
  end
  @data[first]=repldata.first
  repldata
end