From: Logan Capaldo <logancapaldo@...>
Date: 2005-10-12T05:21:50+09:00
Subject: Re: Ruby noob with a coming from Python question


On Oct 11, 2005, at 4:06 PM, Jeff Carlson wrote:

> Oops, I meant the *getMapFromFile* function.  If I could see the  
> ruby way of writing a method to take a file of the form
> key1=value1
> key2=value2
> etc
> and easily make it into a hash in a concise way (as in the python  
> example) that would be great.
>
> Jeff Carlson wrote:
>
>> I am very new to ruby and thought I would start with my simplest  
>> python script and port it over and along the way, learn the "ruby  
>> way" of doing things.  My solution so far is unsatisfactory and  
>> long.  If you have any suggestions, most especially about the  
>> "ruby way" to write the file2Map method, I would appreciate it and  
>> all of my future ruby programs would also appreciate it.
>> Cheers,
>> Jeff Carlson
>> -------------------------------------------------------------
>> #!/usr/bin/python
>> # print statistics for seti@home jobs
>> from mx.DateTime import TimeDelta
>> import sys
>> # this method takes a file with key/value pairs, seperated by "="
>> # and makes a map of the file, keys and values, the length of the
>> # map is the length of the file
>> def getMapFromFile(fname):
>>     lines = open(fname).readlines()
>>         return dict([line.split("=") for line in lines])
>> # make maps of the two files
>> sMap = getMapFromFile(sys.argv[1])
>> uMap = getMapFromFile(sys.argv[2])
>> prog = float(sMap["prog"].strip())*100
>> et = TimeDelta(seconds=float(sMap["cpu"].strip()))
>> #print results
>> print '%.2f%c completed in %d:%02d:%02d' % (prog, '%', et.hour, /
>>     et.minute, et.second)
>> print 'units of work so far %s' % (uMap["nresults"].strip())
>>
>
>


results = File.open(file_name) do |file|
       file.map { |line|
             line.chomp.split(/=/)[0..1]
       }
end.inject({}) { |results, (key, val)| results[key] = val; results }


...OR...

results = {}

File.open(file_name) do |file|
       file.each do |line|
             line.chomp!
             key, val  = line.split(/=/)
             results[key] = val
      end
end

results