Sha256: 4666ecbd4ee3980c8727b31cdc83f627f8296c7ba9ffd4a5c628a7c7832a9d99
Contents?: true
Size: 1.67 KB
Versions: 8
Compression:
Stored size: 1.67 KB
Contents
module Mext
#
# +Mext::CompressedArray+
#
# is an +array+ in which values are expanded according to the following
# format: if a value is a 2-place array it is interpreted as:
# +[value, num_of_repetitions]+. The array is actually expanded during
# creation so there is currently no way to retrieve the original format.
#
class CompressedArray < Array
#
# +Mext::CompressedArray.new(me = [])+
#
# create a array with a special array whose format accept the following
# values:
# * single values (go untreated)
# * arrays of two values (interpreted as +[value, num_of_repetitions]+ -
# +num_of_repetitions+ value is checked to be a +Fixnum+ to expand
# +value+ for +num_of_repetitions+ (otherwise the array is passed unprocessed)
# * anything else is passed unprocessed
#
def initialize(me = [])
new_array = expand(me)
self.replace(new_array)
end
class << self
#
# +from_yaml(hash)+
#
# create from a +yaml+ +Hash+ configuration
#
def from_yaml(ha)
raise ArgumentError unless ha.kind_of?(Hash) && ha.has_key?('args')
args = ha['args']
new(args)
end
end
private
def expand(a)
res = []
a.each do
|val|
if expand_value?(val)
ex_val = expand_value(val)
res.concat(ex_val)
else
res << val
end
end
res
end
def expand_value?(val)
val.kind_of?(Array) && (val.size == 2) && val[1].is_a?(Integer)
end
def expand_value(val)
res = []
value = val[0]
0.upto(val[1]-1) { |n| res << value }
res
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems