CODEWITHSUNDEEP
rubyarraysfile
Big_Bird
Big_Bird

Reputation: 427

Read from a file into an array and save back into file as Array

results = open('names.txt').map { |line| line.split(' ')[0]}
p results
n = "Names_In_Array.txt"
outfile = File.new(n, 'w')
outfile.puts(results)
outfile.close

I'm trying to add quote marks and a comma after each name so I have an array format (besides the brackets). At it's current state, it saves it back into a plain string.

Upvotes: 1

Views: 1704

Answers (2)

TCopple
TCopple

Reputation: 880

It sounds like you want to a take a file like:

ben john joe adam mike bob

and serialize that into an object structure for reading later.

If that is the case, I'd recommend you have a look at YAML. It's built into Ruby and makes reading and writing data structures easy. For example:

require 'yaml'
names = File.read('names.txt').split(' ')
File.open('Names_In_Array.txt') {|f| f << YAML::dump(names)}

You're resulting file can be read in a subsequent program with 

names = YAML::load(File.open('Names_In_Array.txt'))

Upvotes: 1

megas
megas

Reputation: 21791

If understood you correctly:

outfile.puts(results.map{ |m| "\'#{m}\'" }.join(', '))

Upvotes: 0

Related Questions