Replace strings from one array with strings in another in ruby

Question

Similar to Ruby/Rails working with gsub and arrays.

I have two arrays, "errors" and "human_readable".
I would like to read through a file named "logins.log" replace error[x] with human_readable[x]

I don't care where the output goes, stdout is fine.

errors = ["0xC0000064", "0xC000006A", "0xC0000071", "0xC0000072", "0xC0000234"]
human_readable =  ["Unknown User", "Bad Password", "Expired Password", "Account Disabled", "Account Locked"] 
file = ["logins.log"]

file= File.read()
errors.each

lost...

I am sorry, I know this is a dumb question and I am trying but I am getting tangled up in the iteration.

What worked for me (I am sure the other answer is valid but this was easier for me to understand)


 #Create the arrays
 errors = ["0xC0000064", "0xC000006A", "0xC0000071", "0xC0000072", "0xC0000234"]
 human_readable =  ["Unknown User", "Bad Password", "Expired Password", "Account Disabled",  "Account Locked"]

#Create hash from arrays
 zipped_hash = Hash[errors.zip(human_readable)]

#Open file and relace the errors with their counterparts
 new_file_content = File.read("login.log").gsub(Regexp.new(errors.join("|")), zipped_hash)

#Dump output to stdout
 puts new_file_content

This is awesome and will become the template for a lot of stuff, thanks a million.

bjhaid · Accepted Answer · 2014-04-16 14:10:09Z

3

errors = ["0xC0000064", "0xC000006A", "0xC0000071", "0xC0000072", "0xC0000234"]
human_readable =  ["Unknown User", "Bad Password", "Expired Password", "Account Disabled", "Account Locked"]

zipped_hash = Hash[errors.zip(human_readable)]
#=> {"0xC0000064"=>"Unknown User", "0xC000006A"=>"Bad Password", "0xC0000071"=>"Expired Password", "0xC0000072"=>"Account Disabled", "0xC0000234"=>"Account Locked"}

new_file_content = File.read("logins.log").gsub(/\w/) do |word|
  errors.include?(word) ? zipped_hash[word] : word
end

or

new_file_content = File.read("logins.log").gsub(Regexp.new(errors.join("|")), zipped_hash)

puts new_file_content

answered Apr 16, 2014 at 14:10

bjhaid

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2 Comments

TheFiddlerWins Over a year ago

Thank you. Putting the solution above for posterity (assuming I got am not missing something).

Kyle Over a year ago

+1 - you may want to use Regexp#union instead of String#join as it will escape special characters for you - Regexp.union(%w(^ foo.bar)) #=> /\^|foo\.bar/

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