CODEWITHSUNDEEP
rubyarrayshash
Jakub Troszok
Jakub Troszok

Reputation: 103683

Converting hash to string in Ruby

Let's say we have a hash:

flash = {}
flash[:error] = "This is an error."
flash[:info] = "This is an information."

I would like to convert it to a string:

"<div class='error'>This is an error.</div><div class='info'>This is an information".

in nice one liner ;)

I found something like that:

flash.to_a.collect{|item| "<div class='#{item[0]}'>#{item[1]}</div>"}.join

That solves my problem but maybe there is nicer solution built in hashtable class?

Upvotes: 9

Views: 13828

Answers (5)

Simon Gate
Simon Gate

Reputation: 582

Or maby?

class Hash
  def do_sexy
    collect { |k, v| "<div class='#{k}'>#{v}</div>" }.flatten
  end
end

flash = {}
flash[:error] = "This is an error."
flash[:info] = "This is an information."

puts flash.do_sexy

#outputs below
<div class='error'>This is an error.</div>
<div class='info'>This is an information.</div>

Upvotes: 0

Lukas Stejskal
Lukas Stejskal

Reputation: 2562

[:info, :error].collect { |k| "<div class=\"#{k}\">#{flash[k]}</div>" }.join

The only problem with solutions presented so far is that you usually need to list flash messages in particular order - and hash doesn't have it, so IMHO it's better use pre-defined array.

Upvotes: 0

Ray Vernagus
Ray Vernagus

Reputation: 6150

inject is infinitely handy:

flash.inject("") { |acc, kv| acc << "<div class='#{kv[0]}'>#{kv[1]}</div>" }

Upvotes: 0

Bryan Ward
Bryan Ward

Reputation: 6693

You can get the keys in the hash using

flash.keys

and then from there you can build a new array of strings and then join them. So something like

flash.keys.collect {|k| "<div class=#{k}>#{flash[k]}</div>"}.join('')

Does that do the trick?

Upvotes: 0

molf
molf

Reputation: 74935

Hash includes Enumerable, so you can use collect:

flash.collect { |k, v| "<div class='#{k}'>#{v}</div>" }.join

Upvotes: 25

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