From: "Simon Kröger" <SimonKroeger@...>
Date: 2005-08-13T06:53:33+09:00
Subject: Re: no clue


This may not be exactly an improvement but at least ..hmm..
funny?

--------------------------------------------------------------

a = [[0, "x_position: 20, y_position: 40, z_position: 30"],
        [1, "x_position: 20, y_position: 40, z_position: 30"]]

h = eval('{' + ("~" + a.join("~")).
	gsub(/\s*([^:\~|]+):\s*([^,~]+),?/, ':\1=>\'\2\',').
		gsub(/~(\d+)~/, '},\1=>{')[2..-2]+ '}}')

puts h[1][:y_position]

--------------------------------------------------------------

cheers

Simon

Joe Van Dyk wrote:

> On 7/1/05, Daniel Brockman <daniel@brockman.se> wrote:
> 
>>Joe Van Dyk <joevandyk@gmail.com> writes:
> 
> 
> (original attempt.. was too slow)
> 
> 
>>>    attributes = message.split(",")
>>>    attributes.each do |attribute|
>>>      key, value = attribute.scan(/(\w+): (.+)/)[0]
>>>      result_hash[key.to_sym] = value.strip
>>>    end
>>
>>How about this?
>>
>>   message.scan /(\w+)\s*:\s*([^, ]*)/ do |k, v|
>>     result_hash[k.to_sym] = v end
>>
>>
>>>Also, this will get ran potentially thousands of times per second,
>>>so executation speed is of some concern.
>>
>>I don't know if the above is the best you can do, but I do believe it
>>is a bit faster than your original version.
> 
> 
> Bringing up an old thread.... I have the following code.
> 
>   # Converts an array like
>   # [[0, "x_position: 20, y_position: 40, z_position: 30"],
>   #  [1, "x_position: 20, y_position: 40, z_position: 30"]
>   # ]
>   #  
>   #  into a hash like
>   #  { 0 => { :x_position => "20", :y_position => "40", :z_position => "30" },
>   #    1 => { :x_position => "20", :y_position => "40", :z_position => "30" }
>   #  }
>   def self.convert_message_to_hash players_array
>     raise "Can't do anything with empty message!" if original_message.nil?
>     result_hash = {}
>     original_message.each do |id, message|
>       message.scan(/(\w+)\s*:\s*([^, ]*)/) do |k, v|
>         result_hash[id][k.to_sym] = v 
>       end
>     end
>     result_hash
>   end
> end
> 
> That code in my application leads to the following profiling:
>   %   cumulative   self              self     total
>  time   seconds   seconds    calls  ms/call  ms/call  name
>  37.84   261.23    261.23     5569    46.91    69.61  String#scan
>   8.12   317.28     56.05   201791     0.28     0.28  Hash#[]
>   6.42   409.72     44.31   150783     0.29     0.29  Hash#[]=
>   6.36   453.61     43.89   144782     0.30     0.30  String#to_sym
> 
> I believe this is probably the critical part of my code.
> 
> Ideas on how to improve this would be appreciated!
> 
>