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?
Hash includes Enumerable, so you can use collect:
flash.collect { |k, v| "<div class='#{k}'>#{v}</div>" }.join
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?
inject is infinitely handy:
flash.inject("") { |acc, kv| acc << "<div class='#{kv[0]}'>#{kv[1]}</div>" }
[: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.
OrderedHash if you require Ruby 1.8.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>
