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Size: 1.59 KB
Versions: 35
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Stored size: 1.59 KB
Contents
require 'singleton'
class SafeHash < BlankSlate
attr_reader :hash
def initialize hash = {}
reinitialize hash
end
def []= key, value
value = SafeHash.new value if value.is_a? Hash
@hash[key.to_s] = value
end
def include? key
@hash.include? key.to_s
end
def [] key, *args
key = key.to_s
if key.last == '!'
key = key[0..key.size-2]
if (result = @hash[key]).eql? nil
raise "No key #{key}"
else
result
end
elsif key.last == '?'
key = key[0..key.size-2]
@hash.include? key
elsif (result = @hash[key]).eql? nil
if args.empty?
SafeNil.instance
else
return *args
end
else
result
end
end
def reinitialize hash
@hash = {}
hash.each do |k, v|
v = SafeHash.new v if v.is_a? Hash
@hash[k.to_s] = v
end
# @hash.freeze
end
def method_missing m, *args
self[m, *args]
end
def to_yaml *args
@hash.to_yaml *args
end
def inspect
@hash.inspect
end
def to_h
@hash
end
class SafeNil < BlankSlate
include Singleton
def [] key, *args
if key.to_s.last == '!'
raise "No key #{key}"
elsif args.empty?
SafeNil.instance
else
return *args
end
end
def method_missing m, *args
self[m, *args]
end
def include? key
false
end
def to_b
false
end
def to_yaml *args
nil.to_yaml *args
end
def to_h
{}
end
def inspect
nil.inspect
end
end
end
Version data entries
35 entries across 35 versions & 2 rubygems