CODEWITHSUNDEEP
ruby-on-railsrubyarrayshashsymbols
Andrew Walz
Andrew Walz

Reputation: 750

Converting ruby array into a hash with symbols

Im still pretty new to programming, and i am trying to convert an array of strings into a hash with symbols. The formatting of the strings are giving me grief:

foobar = ["ABC: OPEN", "123: OPEN", "FOO: CLOSED", "BAR: CLOSED", "XYZ: OPEN", "LMO: CLOSED"]

I am trying to get this "name: status" format to transfer to a hash where the key can be a symbol:

foobar_hash = {"ABC" => :OPEN, "123" => :OPEN, "FOO" => :CLOSED, "BAR" => :CLOSED, "XYZ" => :CLOSED, "LMO" => :CLOSED}

What would be the best way to accomplish this?

Upvotes: 1

Views: 1936

Answers (6)

Darkmouse
Darkmouse

Reputation: 1939

You could try this

keys = "foobar".map{|s|s.split(':')}.map(&:first)
values = "foobar".map{|s|s.split(':')}.map(&:last)

Hash[keys.zip(values)]

Upvotes: 0

Aaditi Jain
Aaditi Jain

Reputation: 7027

This might work :

foobar_hash = {}
foobar.each { |s| foobar_hash[s.split(":")[0].strip] = s.split(":")[1].strip.to_sym }

Upvotes: 0

Anthony
Anthony

Reputation: 15957

You could do something like this:

[4] pry(main)> foobar = ["ABC: OPEN", "123: OPEN", "FOO: CLOSED", "BAR: CLOSED", "XYZ: OPEN", "LMO: CLOSED"]

=> ["ABC: OPEN", "123: OPEN", "FOO: CLOSED", "BAR: CLOSED", "XYZ: OPEN", "LMO: CLOSED"]
[5] pry(main)> foobar.map { |i| i.split(": ") }.to_h
=> {"ABC"=>"OPEN",
 "123"=>"OPEN",
 "FOO"=>"CLOSED",
 "BAR"=>"CLOSED",
 "XYZ"=>"OPEN",
 "LMO"=>"CLOSED"}

If you need the colon in front of the value you can do something like this too:

[14] pry(main)> foobar.map { |i| i.gsub(": ", " :") }.map { |j| j.split(" ") }.to_h
=> {"ABC"=>":OPEN",
 "123"=>":OPEN",
 "FOO"=>":CLOSED",
 "BAR"=>":CLOSED",
 "XYZ"=>":OPEN",
 "LMO"=>":CLOSED"}

One more iteration if you need the values to be symbols, you could do this:

[35] pry(main)> foobar.map { |i| i.split(": ") }.each_with_object({}) do |array, hash|
[35] pry(main)*   hash[array.first] = array.last.to_sym
[35] pry(main)* end

=> {"ABC"=>:OPEN, "123"=>:OPEN, "FOO"=>:CLOSED, "BAR"=>:CLOSED, "XYZ"=>:OPEN, "LMO"=>:CLOSED}

Upvotes: 0

Arup Rakshit
Arup Rakshit

Reputation: 118261

One more way :-

arr = [
  "ABC: OPEN",
  "123: OPEN",
  "FOO: CLOSED",
  "BAR: CLOSED",
  "XYZ: OPEN",
  "LMO: CLOSED"
]

arr.each_with_object({}) do |string, hash| 
  key, val = string.scan(/\w+/)
  hash[key] = val.to_sym
end

# => {"ABC"=>:OPEN,
#     "123"=>:OPEN,
#     "FOO"=>:CLOSED,
#     "BAR"=>:CLOSED,
#     "XYZ"=>:OPEN,
#     "LMO"=>:CLOSED}

Upvotes: 1

Kranthi
Kranthi

Reputation: 1417

foobar = ["ABC: OPEN", "123: OPEN", "FOO: CLOSED", "BAR: CLOSED", "XYZ: OPEN", "LMO: CLOSED"]
foo_hash = Hash.new
foobar.each { |str| k,v = str.split(': '); foo_hash[k] = v.to_sym }

foo_hash gives you

=> {"ABC"=>:OPEN, "123"=>:OPEN, "FOO"=>:CLOSED, "BAR"=>:CLOSED, "XYZ"=>:OPEN, "LMO"=>:CLOSED}

Upvotes: 0

August
August

Reputation: 12558

Something like this?

arr = [
  "ABC: OPEN",
  "123: OPEN",
  "FOO: CLOSED",
  "BAR: CLOSED",
  "XYZ: OPEN",
  "LMO: CLOSED"
]

Hash[arr.map { |x| x.split ": " }]

=> {"ABC"=>"OPEN",
"123"=>"OPEN",
"FOO"=>"CLOSED",
"BAR"=>"CLOSED",
"XYZ"=>"OPEN",
"LMO"=>"CLOSED"}

If you want symbol key/values: Hash[arr.map { |x| x.split(": ").map(&:to_sym) }]

Upvotes: 4

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