Module: Knj::ArrayExt

Defined in:
lib/knj/arrayext.rb

Class Method Summary collapse

Class Method Details

.array_hash(arr) ⇒ Object

Returns a hash based on the string-values of an array.



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# File 'lib/knj/arrayext.rb', line 166

def self.array_hash(arr)
  hashes = []
  arr.each do |ele|
    hashes << Digest::MD5.hexdigest(ele.to_s)
  end
  
  return Digest::MD5.hexdigest(hashes.join("_"))
end

.array_to_hash(arr) ⇒ Object

Converts an array to a hash with the index a string-numbers.



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# File 'lib/knj/arrayext.rb', line 48

def self.array_to_hash(arr)
  ret = {}
  arr.each do |item|
    ret[ret.length.to_s] = item
  end
  
  return ret
end

.clone_encode(hash, encoding, args = {}) ⇒ Object

Forces all strings in an array or a hash to be encoded to a specific encoding recursively.



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# File 'lib/knj/arrayext.rb', line 197

def self.clone_encode(hash, encoding, args = {})
  return hash if !hash
  
  hash = hash.clone
  Knj::Php.foreach(hash) do |key, val|
    if val.is_a?(String)
      begin
        hash[key] = Knj::Php.utf8_encode(encoding)
      rescue Encoding::UndefinedConversionError => e
        if args["ignore_encoding_errors"]
          next
        else
          raise e
        end
      end
    elsif val.is_a?(Array) or val.is_a?(Hash)
      hash[key] = Knj::ArrayExt.clone_encode(val, encoding, args)
    end
  end
  
  return hash
end

.dict(arr) ⇒ Object 



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# File 'lib/knj/arrayext.rb', line 89

def self.dict(arr)
  ret = Dictionary.new
  arr.each do |item|
    ret[ret.length.to_s] = item
  end
  
  return ret
end

.hash_diff?(h1, h2, args = {}) ⇒ Boolean

Compares the keys and values of two hashes and returns true if they are different.

Returns:

  • (Boolean) 


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# File 'lib/knj/arrayext.rb', line 113

def self.hash_diff?(h1, h2, args = {})
  if !args.key?("h1_to_h2") or args["h1_to_h2"]
    h1.each do |key, val|
      return true if !h2.key?(key)
      
      hash_val = h2[key].to_s
      hash_val = hash_val.force_encoding("UTF-8") if hash_val.respond_to?(:force_encoding)
      
      val = val.to_s
      val = val.force_encoding("UTF-8") if val.respond_to?(:force_encoding)
      
      return true if hash_val != val
    end
  end
  
  if !args.key?("h2_to_h1") or args["h2_to_h1"]
    h2.each do |key, val|
      return true if !h1.key?(key)
      
      hash_val = h1[key].to_s
      hash_val = hash_val.force_encoding("UTF-8") if hash_val.respond_to?(:force_encoding)
      
      val = val.to_s
      val = val.force_encoding("UTF-8") if val.respond_to?(:force_encoding)
      
      return true if hash_val != val
    end
  end
  
  return false
end

.hash_keys_hash(hash) ⇒ Object

Returns a hash based on the string-keys in a hash.



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# File 'lib/knj/arrayext.rb', line 146

def self.hash_keys_hash(hash)
  hashes = []
  hash.keys.sort.each do |key|
    hashes << Digest::MD5.hexdigest(key.to_s)
  end
  
  return Digest::MD5.hexdigest(hashes.join("_"))
end

.hash_md5(hash) ⇒ Object

Returns a hash based on the keys and values of a hash.



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# File 'lib/knj/arrayext.rb', line 99

def self.hash_md5(hash)
  combined_val = ""
  hash.each do |key, val|
    if combined_val.length > 0
      combined_val << ";"
    end
    
    combined_val << "#{key}:#{val}"
  end
  
  return Digest::MD5.hexdigest(combined_val)
end

.hash_numeric_keys?(hash) ⇒ Boolean

Returns true if all keys in a hash are numeric objects.

Returns:

  • (Boolean) 


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# File 'lib/knj/arrayext.rb', line 58

def self.hash_numeric_keys?(hash)
  all_num = true
  hash.each do |key, val|
    if !Knj::Php.is_numeric(key)
      all_num = false
      break
    end
  end
  
  return all_num
end

.hash_sort(hash, &block) ⇒ Object

Sorts the hash without being a retard…



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# File 'lib/knj/arrayext.rb', line 185

def self.hash_sort(hash, &block)
  sorted = hash.sort(&block)
  
  ret = {}
  sorted.each do |ele|
    ret[ele[0]] = ele[1]
  end
  
  return ret
end

.hash_sym(hash_given) ⇒ Object

Converts all keys in the given hash to symbols.



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# File 'lib/knj/arrayext.rb', line 71

def self.hash_sym(hash_given)
  raise "Invalid argument-class: '#{hash_given.class.name}'." if !hash_given or !hash_given.respond_to?(:each)
  
  adds = {}
  hash_given.each do |key, value|
    if !key.is_a?(Symbol)
      adds[key.to_sym] = value
      hash_given.delete(key)
    end
  end
  
  adds.each do |key, value|
    hash_given[key] = value
  end
  
  return hash_given
end

.hash_values_hash(hash) ⇒ Object

Returns hash based on the string-values in a hash.



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# File 'lib/knj/arrayext.rb', line 156

def self.hash_values_hash(hash)
  hashes = []
  hash.keys.sort.each do |key|
    hashes << Digest::MD5.hexdigest(hash[key].to_s)
  end
  
  return Digest::MD5.hexdigest(hashes.join("_"))
end

.join(args = {}, key = nil, sep = nil) ⇒ Object 



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# File 'lib/knj/arrayext.rb', line 2

def self.join(args = {}, key = nil, sep = nil)
  if args.is_a?(Array) and sep
    args = {
      :arr => args,
      :sep => sep,
      :key => key
    }
  end
  
  raise "No seperator given." if !args[:sep]
  
  str = ""
  first = true
  
  Knj::Php.foreach(args[:arr]) do |key, value|
    if first
      first = false
    else
      str << args[:sep]
    end
    
    if args[:key]
      value = key
    else
      value = value
    end
    
    if args[:callback]
      if args[:callback].is_a?(Proc) or args[:callback].is_a?(Method)
        value = args[:callback].call(value)
      else
        value = Knj::Php.call_user_func(args[:callback], value) if args[:callback]
      end
    end
    
    raise "Callback returned nothing." if args[:callback] and !value
    
    str << args[:surr] if args[:surr]
    str << value.to_s
    str << args[:surr] if args[:surr]
  end
  
  return str
end

.validate_hash(h, args) ⇒ Object

Validates a hash of data.



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# File 'lib/knj/arrayext.rb', line 176

def self.validate_hash(h, args)
  h.each do |key, val|
    if args.key?(:not_empty) and args[:not_empty].index(key) != nil and val.to_s.strip.length <= 0
      raise Knj::Errors::InvalidData, sprintf(args[:not_empty_error], key)
    end
  end
end