/
hash_zipnew.rb
executable file
·111 lines (98 loc) · 2.58 KB
/
hash_zipnew.rb
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#!/usr/bin/ruby -wKU
#
# Code Reading #2
require '../base'
require "facets/hash/zipnew"
# Alternative implementation
class Hash
def self.alt_zipnew(keys, values)
h = {}
keys.each_with_index {|key, index| h[ key ] = values[ index ] }
h
end
def self.alt_zipnew_from_felix(keys, values)
Hash[*[keys, values].transpose.flatten]
end
end
class HashZipnew
def data
keys = [
'2010-05-15',
'2010-05-16',
'2010-05-17',
'2010-05-18',
'2010-05-19'
]
values = [
100.0,
450.5,
89.0,
0.0,
78.5
]
Hash.zipnew(keys, values)
end
def alternative_implementation
keys = [
'2010-05-15',
'2010-05-16',
'2010-05-17',
'2010-05-18',
'2010-05-19'
]
values = [
100.0,
450.5,
89.0,
0.0,
78.5
]
Hash.alt_zipnew(keys, values)
end
def alternative_implementation_from_felix
keys = [
'2010-05-15',
'2010-05-16',
'2010-05-17',
'2010-05-18',
'2010-05-19'
]
values = [
100.0,
450.5,
89.0,
0.0,
78.5
]
Hash.alt_zipnew_from_felix(keys, values)
end
end
ap(HashZipnew.new.data)
ap(HashZipnew.new.alternative_implementation)
ap(HashZipnew.new.alternative_implementation_from_felix)
class HashZipnewTest < Test::Unit::TestCase
def test_use_the_arrays_to_map_keys_to_values
hashish = HashZipnew.new.data
assert_equal 100.0, hashish['2010-05-15']
assert_equal 450.5, hashish['2010-05-16']
assert_equal 89.0, hashish['2010-05-17']
assert_equal 0.0, hashish['2010-05-18']
assert_equal 78.5, hashish['2010-05-19']
end
def test_alternative_implementation
hashish = HashZipnew.new.alternative_implementation
assert_equal 100.0, hashish['2010-05-15']
assert_equal 450.5, hashish['2010-05-16']
assert_equal 89.0, hashish['2010-05-17']
assert_equal 0.0, hashish['2010-05-18']
assert_equal 78.5, hashish['2010-05-19']
end
def test_alternative_implementation_from_felix
hashish = HashZipnew.new.alternative_implementation_from_felix
assert_equal 100.0, hashish['2010-05-15']
assert_equal 450.5, hashish['2010-05-16']
assert_equal 89.0, hashish['2010-05-17']
assert_equal 0.0, hashish['2010-05-18']
assert_equal 78.5, hashish['2010-05-19']
end
end