From: Vance A Heron <heron@...>
Date: 2005-04-26T12:35:13+09:00
Subject: Re: long conversion ...

Or - with the same rows array...

  rows.each{|r|
    puts r.inject(0){|sum, v| sum = (sum*0x100) + v.to_i}
  }

Vance

On Tue, 2005-04-26 at 10:04 +0900, Ara.T.Howard@noaa.gov wrote:
> On Tue, 26 Apr 2005, Zach Dennis wrote:
> 
> > The data is being written from another application to a binary file. I have
> > isolated and confirmed that 4 bytes correspond to a certain number input (a
> > maximum folder size is what the number means). I am reading the file and
> > parsing it's information. I have every field working except for this max
> > folder size.
> >
> > It appears that my numbers for 50 were wrong in my original post, although
> > with the logic you applied Ara my wishful thinking was still way off base.
> >
> > Here is a sample of the first 50 rows of data. Each row signifies the # of
> > Megabytes defined for max storage. Each column signifies a byte in the
> > position they are in the file. The first column and the first row are labels
> > in this email.
> >
> > This is another numbers/patterns/algorithms things similar to what I posted
> > a few weeks ago, but this time it appears slighly more difficult.
> >
> > If anyone has the time, the patience and the know-how to make sense of this,
> > any help would greatly be appreciated. If not then I will keep thinking
> > about ways to attack this problem. Thanks in advance,
> 
> network ordered longs?
> 
>    harp:~ > cat a.rb
>    rows = [
>      %w[ 0       0       0       0   ] ,
>      %w[ 0       15      66      64  ] ,
>      %w[ 0       30      132     128 ] ,
>      %w[ 0       45      198     192 ] ,
>      %w[ 0       61      9       0   ] ,
>      %w[ 0       76      75      64  ] ,
>      %w[ 0       91      141     128 ] ,
>      %w[ 0       106     207     192 ] ,
>      %w[ 0       122     18      0   ] ,
>      %w[ 0       137     84      64  ] ,
>      %w[ 0       152     150     128 ] ,
>      %w[ 0       167     216     192 ] ,
>      %w[ 0       183     27      0   ] ,
>      %w[ 0       198     93      64  ] ,
>      %w[ 0       213     159     128 ] ,
>      %w[ 0       228     225     192 ] ,
>      %w[ 0       244     36      0   ] ,
>      %w[ 1       3       102     64  ] ,
>      %w[ 1       18      168     128 ] ,
>      %w[ 1       33      234     192 ] ,
>      %w[ 1       49      45      0   ] ,
>      %w[ 1       64      111     64  ] ,
>      %w[ 1       79      177     128 ] ,
>      %w[ 1       94      243     192 ] ,
>      %w[ 1       109     54      0   ] ,
>      %w[ 1       125     120     64  ] ,
>      %w[ 1       140     186     128 ] ,
>      %w[ 1       155     252     192 ] ,
>      %w[ 1       171     63      0   ] ,
>      %w[ 1       186     129     64  ] ,
>      %w[ 1       202     195     128 ] ,
>      %w[ 1       217     5       192 ] ,
>      %w[ 1       232     72      0   ] ,
>      %w[ 1       247     138     64  ] ,
>      %w[ 2       6       204     128 ] ,
>      %w[ 2       22      14      192 ] ,
>      %w[ 2       37      81      0   ] ,
>      %w[ 2       52      147     64  ] ,
>      %w[ 2       67      213     128 ] ,
>      %w[ 2       83      23      192 ] ,
>      %w[ 2       98      90      0   ] ,
>      %w[ 2       113     156     64  ] ,
>      %w[ 2       128     222     128 ] ,
>      %w[ 2       144     32      192 ] ,
>      %w[ 2       159     99      0   ] ,
>      %w[ 2       174     165     64  ] ,
>      %w[ 2       189     231     128 ] ,
>      %w[ 2       205     41      192 ] ,
>      %w[ 2       220     108     0   ] ,
>      %w[ 2       235     174     64  ] ,
>      %w[ 2       250     240     128 ] ,
>    ]
> 
> 
>    rows.each do |row|
>      bytes = row.map{|value| value.to_i}
>      word = bytes.inject(''){|s,byte| s << byte.chr}
>      p word.unpack('N')
>    end
> 
>    harp:~ > ruby a.rb
>    [0]
>    [1000000]
>    [2000000]
>    [3000000]
>    [4000000]
>    [5000000]
>    [6000000]
>    [7000000]
>    [8000000]
>    [9000000]
>    [10000000]
>    [11000000]
>    [12000000]
>    [13000000]
>    [14000000]
>    [15000000]
>    [16000000]
>    [17000000]
>    [18000000]
>    [19000000]
>    [20000000]
>    [21000000]
>    [22000000]
>    [23000000]
>    [23934464]
>    [25000000]
>    [26000000]
>    [27000000]
>    [28000000]
>    [29000000]
>    [30065536]
>    [31000000]
>    [32000000]
>    [33000000]
>    [34000000]
>    [35000000]
>    [36000000]
>    [37000000]
>    [38000000]
>    [39000000]
>    [40000000]
>    [41000000]
>    [42000000]
>    [43000000]
>    [44000000]
>    [45000000]
>    [46000000]
>    [47000000]
>    [48000000]
>    [49000000]
>    [50000000]
> 
> 
> look reasonable no?
> 
> cheers.
> 
> -a