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Contents
# TITLE:
#
# Hash Constructor Extensions
#
# SUMMARY:
#
# Alternate constructors for Hash.
#
# CREDIT:
#
# - Jan Molic
# - Ara.T.Howard
#
class Hash
# Hash which auto initializes it's children.
#
# ah = Hash.autonew
# ah['section one']['param one'] = 4
# ah['section one']['param two'] = 5
# ah['section one']['param three'] = 2
# ah['section one']['param four'] = 3
#
# p ah
# # {"section one"=>{"param one"=>4, "param four"=>3, "param three"=>2, "param two"=>5}}
#
# p ah['section one'].keys
# # ["param one", "param four", "param three", "param two"]
#
def self.autonew(*args)
#new(*args){|a,k| a[k] = self.class::new(*args)}
leet = lambda { |hsh, key| hsh[key] = new( &leet ) }
new(*args,&leet)
end
# Creates a new hash from two arrays --a keys array and
# a values array.
#
# Hash.zipnew(["a","b","c"], [1,2,3])
# #=> { "a"=>1, "b"=>2, "c"=>3 }
#
def self.zipnew(keys,values) # or some better name
h = {}
keys.size.times{ |i| h[ keys[i] ] = values[i] }
h
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TestHashNew < Test::Unit::TestCase
def test_zipnew
a = [1,2,3]
b = [4,5,6]
assert_equal( {1=>4,2=>5,3=>6}, Hash.zipnew(a,b) )
end
end
=end
Version data entries
10 entries across 10 versions & 1 rubygems