Module: NamedArray

Extended by:
MetaExtension
Defined in:
lib/scout/named_array.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from MetaExtension

extended, is_extended?, purge

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 131

def method_missing(name, *args)
  if identify_name(name)
    return self[name]
  else
    return super(name, *args)
  end
end

Class Method Details

._zip_fields(array, max = nil) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 91

def self._zip_fields(array, max = nil)
  return [] if array.nil? or array.empty? or (first = array.first).nil?

  max = array.collect{|l| l.length }.max if max.nil?

  rest = array[1..-1].collect{|v|
    v.length == 1 & max > 1 ? v * max : v
  }

  first = first * max if first.length == 1 and max > 1

  first.zip(*rest)
end

.add_zipped(source, new) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 124

def self.add_zipped(source, new)
  source.zip(new).each do |s,n|
    s.concat(n)
  end
  source
end

.field_match(field, name) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 6

def self.field_match(field, name)
  if (String === field) && (String === name)
    field == name || 
      field.start_with?(name) || field.include?("(" + name + ")") ||
      name.start_with?(field) || name.include?("(" + field + ")")
  else
    field == name
  end
end

.identify_name(names, selected, strict: false) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 16

def self.identify_name(names, selected, strict: false)
  res = (Array === selected ? selected : [selected]).collect do |field|
    case field
    when nil
      0
    when Range
      field
    when Integer
      field
    when Symbol
      field == :key ? field : identify_name(names, field.to_s)
    when (names.nil? and String)
      if field =~ /^\d+$/
        identify_field(key_field, fields, field.to_i)
      else
        raise "No name information available and specified name not numeric: #{ field }"
      end
    when Symbol
      names.index{|f| f.to_s == field.to_s }
    when String
      pos = names.index{|f| f.to_s == field }
      next pos if pos
      if field =~ /^\d+$/
        next identify_names(names, field.to_i)
      end
      next pos if strict
      pos = names.index{|name| field_match(field, name) }
      next pos if pos
      nil
    else
      raise "Field '#{ Log.fingerprint field }' was not understood. Options: (#{ Log.fingerprint names })"
    end
  end

  Array === selected ? res : res.first
end

.zip_fields(array) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 105

def self.zip_fields(array)
  if array.length < 10000
    _zip_fields(array)
  else
    zipped_slices = []
    max = array.collect{|l| l.length}.max
    array.each_slice(10000) do |slice|
      zipped_slices << _zip_fields(slice, max)
    end
    new = zipped_slices.first
    zipped_slices[1..-1].each do |rest|
      rest.each_with_index do |list,i|
        new[i].concat list
      end
    end
    new
  end
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 67

def [](key)
  pos = NamedArray.identify_name(@fields, key)
  return nil if pos.nil?
  super(pos)
end

#concat(other) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 73

def concat(other)
  super(other)
  self.fields.concat(other.fields) if NamedArray === other
  self
end

#identify_name(selected) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 53

def identify_name(selected)
  NamedArray.identify_name(fields, selected)
end

#positions(fields) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 57

def positions(fields)
  if Array ==  fields
    fields.collect{|field|
      NamedArray.identify_name(@fields, field)
    }
  else
    NamedArray.identify_name(@fields, fields)
  end
end

#to_hash ⇒ Object 



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# File 'lib/scout/named_array.rb', line 79

def to_hash
  hash = {}
  self.fields.zip(self) do |field,value|
    hash[field] = value
  end
  IndiferentHash.setup hash
end

#values_at(*positions) ⇒ Object 



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# File 'lib/scout/named_array.rb', line 87

def values_at(*positions)
  super(*identify_name(positions))
end