Parsing a dictionary text file in ruby - ruby

Question

I am using ruby to try and parse a text file that has the form...
AAB eel bbc
ABA did eye non pap mom ere bob nun eve pip gig dad nan ana gog aha
mum sis ada ava ewe pop tit gag tat bub pup
eke ele hah huh pep sos tot wow aba ala
bib dud tnt
ABB all see off too ill add lee ass err xii ann fee vii inn egg odd bee dee goo
woo cnn pee fcc tee wee ebb edd gee ott ree vee ell orr rcc att boo cee cii
coo kee moo mss soo doo faa hee icc iss itt kii loo mee nee nuu ogg opp pii
tll upp voo zee
I need to be able to search by the first column, such as "AAB",and then search through all values that are associated with that key. I have tried to import the text file into a hash of arrays but could never get more than the first value to store. I have no preference as to how I can search the file, whether that is store the data into some data structure or just search the text file every time, I just need to be able to do it. I am at a loss as to how to proceed with this and any help would be greatly appreciated. Thanks
-amc25114

Answer 1

This will read your dictionary file. I'm storing the content in a string, then
turning it into a StringIO object to let me pretend it's a file. You can use
File.readlines to read directly from the file itself:
require 'pp'
require 'stringio'
text = 'AAB eel bbc
ABA did eye non pap mom ere bob nun eve pip gig dad nan ana gog aha
mum sis ada ava ewe pop tit gag tat bub pup
eke ele hah huh pep sos tot wow aba ala
bib dud tnt
ABB all see off too ill add lee ass err xii ann fee vii inn egg odd bee dee goo
woo cnn pee fcc tee wee ebb edd gee ott ree vee ell orr rcc att boo cee cii
coo kee moo mss soo doo faa hee icc iss itt kii loo mee nee nuu ogg opp pii
tll upp voo zee
'
file = StringIO.new(text)
dictionary = Hash[
file.readlines.slice_before(/^\S/).map{ |ary|
key, *values = ary.map(&:strip).join(' ').split(' ')
[key, values]
}
]
dictionary is a hash looking like:
{
"AAB"=>[
"eel", "bbc"
],
"ABA"=>[
"did", "eye", "non", "pap", "mom", "ere", "bob", "nun", "eve", "pip",
"gig", "dad", "nan", "ana", "gog", "aha", "mum", "sis", "ada", "ava",
"ewe", "pop", "tit", "gag", "tat", "bub", "pup", "eke", "ele", "hah",
"huh", "pep", "sos", "tot", "wow", "aba", "ala", "bib", "dud", "tnt"
],
"ABB"=>[
"all", "see", "off", "too", "ill", "add", "lee", "ass", "err", "xii",
"ann", "fee", "vii", "inn", "egg", "odd", "bee", "dee", "goo", "woo",
"cnn", "pee", "fcc", "tee", "wee", "ebb", "edd", "gee", "ott", "ree",
"vee", "ell", "orr", "rcc", "att", "boo", "cee", "cii", "coo", "kee",
"moo", "mss", "soo", "doo", "faa", "hee", "icc", "iss", "itt", "kii",
"loo", "mee", "nee", "nuu", "ogg", "opp", "pii", "tll", "upp", "voo", "zee"
]
}
You can look up using the keys:
dictionary['AAB']
=> ["eel", "bbc"]
And search inside the array using include?:
dictionary['AAB'].include?('eel')
=> true
dictionary['AAB'].include?('foo')
=> false

Answer 2

class A
def initialize
#h, key = readlines.inject({}) do |m, s|
a = s.split
m[key = a.shift] = [] if s =~ /^[^\s]/
m[key] += a
m
end
end
def lookup k, v # not sure what you really want to do here
p [k, v, (#h[k].index v)]
end
self
end.new.lookup 'ABA', 'wow'

Answer 3

My 2 cents:
file = File.open("/path_to_file_here")
recent_key = ""
results = Hash.new
while (line = file.gets)
key = line[/[A-Z]+/]
recent_key = key if key
line.scan(/[a-z]+/).each do |val|
results[recent_key.to_sym] = [] if !results[recent_key.to_sym]
results[recent_key.to_sym] << val
end
end
puts results
This will give you this ouput:
{
:AAB=>["eel", "bbc"],
:ABA=>["did", "eye", "non", "pap", "mom", "ere", "bob", "nun", "eve", "pip", "gig", "dad", "nan", "ana", "gog", "aha", "mum", "sis", "ada", "ava", "ewe", "pop", "tit", "gag", "tat", "bub", "pup", "eke", "ele", "hah", "huh", "pep", "sos", "tot", "wow", "aba", "ala", "bib", "dud", "tnt"],
:ABB=>["all", "see", "off", "too", "ill", "add", "lee", "ass", "err", "xii", "ann", "fee", "vii", "inn", "egg", "odd", "bee", "dee", "goo", "woo", "cnn", "pee", "fcc", "tee", "wee", "ebb", "edd", "gee", "ott", "ree", "vee", "ell", "orr", "rcc", "att", "boo", "cee", "cii", "coo", "kee", "moo", "mss", "soo", "doo", "faa", "hee", "icc", "iss", "itt", "kii", "loo", "mee", "nee", "nuu", "ogg", "opp", "pii", "tll", "upp", "voo", "zee"]
}