LTD Puzzle 7: format bytes and add postfixes

[chrissie1]

Given a numerical input of bytes, create a function to format the output to two decimal places along with the relevant postfixes

e.g.

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1. Input: 54831             Expected Output: 53.55 kilobytes
2. Input: 1384120           Expected Output: 1.32 megabytes
3. Input: 24568971464       Expected Output: 22.88 gigabytes
4. Input: 7392649371023     Expected Output: 6.72 terabytes

For clarification in this puzzle we would have to define whether the increments are in 1000's or 1024's and define each postfix like so:

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1. Kilobytes
2. Megabytes
3. Gigabytes
4. Terabytes
5. Petabytes
6. Exabytes
7. Zettabytes
8. Yottabytes

So we want the correct and HD-manufacturers result .

[b3orn]

Am I really understood the puzzle?

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1. from math import log, floor, pow
2.  
3. test = (54831, 1384120, 24568971464, 7392649371023)
4.  
5. unit = ("Kilobytes",
6.         "Megabytes",
7.         "Gigabytes",
8.         "Terabytes",
9.         "Petabytes",
10.         "Exabytes",
11.         "Zettabytes",
12.         "Yottabytes")
13.  
14. increment = 1024
15.  
16. for value in test:
17.     index = int(floor(log(value, increment)))
18.     print "%.2f %s" % ((float(value) / pow(increment, index)), unit[index - 1].lower())

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This is the output:

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1. 53.55 kilobytes
2. 1.32 megabytes
3. 22.88 gigabytes
4. 6.72 terabytes

[chrissie1]

I think you did.

Don't worry, next week will be a difficult one

[b3orn]

Am I really understood the puzzle?

But what I wrote above? I definitely need an english course ...

[spoulson]

Here is a C# 3.0 method that takes advantage of anonymous types.

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1. public enum SizeUnitKind { Metric = 1000, Binary = 1024 }
2.  
3. public static string PrettySize(double Size, SizeUnitKind SizeUnit) {
4.    var u = SizeUnit == SizeUnitKind.Binary ?
5.       new { Kilobyte = 1024.0, Megabyte = 1048576.0, Gigabyte = 1073741824.0, Terabyte = 1099511627776.0, Petabyte = 1125899906842624.0, Exabyte = 1152921504606846976.0, Zettabyte = 1180591620717411303424.0, Yottabyte = 1208925819614629174706176.0 } :
6.       new { Kilobyte = 1000.0, Megabyte = 1000000.0, Gigabyte = 1000000000.0, Terabyte = 1000000000000.0, Petabyte = 1000000000000000.0, Exabyte = 1000000000000000000.0, Zettabyte = 1000000000000000000000.0, Yottabyte = 1000000000000000000000000.0 };
7.            
8.    return Size < u.Kilobyte ? Size.ToString("0 Bytes") :
9.       Size < u.Megabyte ? (Size / u.Kilobyte).ToString("0.00 Kilobytes") :
10.       Size < u.Gigabyte ? (Size / u.Megabyte).ToString("0.00 Megabytes") :
11.       Size < u.Terabyte ? (Size / u.Gigabyte).ToString("0.00 Gigabytes") :
12.       Size < u.Petabyte ? (Size / u.Terabyte).ToString("0.00 Terabytes") :
13.       Size < u.Exabyte ? (Size / u.Petabyte).ToString("0.00 Petabytes") :
14.       Size < u.Zettabyte ? (Size / u.Exabyte).ToString("0.00 Exabytes") :
15.       Size < u.Yottabyte ? (Size / u.Zettabyte).ToString("0.00 Zettabytes") :
16.       (Size / u.Yottabyte).ToString("0.00 Yottabytes");
17. } 

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Incase you can't tell, I'm a big fan of the ternary operator.

[Emtucifor]

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1. IF OBJECT_ID('ByteFormat', 'FN') IS NOT NULL DROP FUNCTION ByteFormat
2. GO
3. CREATE FUNCTION ByteFormat (@VALUE DECIMAL(30,3), @K INT)
4. RETURNS VARCHAR(1000)
5. AS
6. BEGIN
7.    DECLARE @I INT
8.    SET @I = 0
9.    WHILE @VALUE >= @K OR @I = 0 BEGIN
10.       SET @VALUE = @VALUE / @K
11.       SET @I = @I + 1
12.    END
13.    RETURN CONVERT(VARCHAR(32), CONVERT(DECIMAL(30,2), @VALUE)) + ' ' + (SELECT VALUE FROM dbo.Split2('kilo,mega,giga,tera,peta,exa,zetta,yotta') WHERE TokenID = @I) + 'bytes'
14. END
15. GO
16. SELECT VALUE, Formatted = dbo.ByteFormat(VALUE, 1024)
17. FROM dbo.Split2('54831,1384120,24568971464,7392649371023')

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1. CREATE FUNCTION Split2 (@InputText VARCHAR(8000))
2. RETURNS @VALUES TABLE (TokenID INT IDENTITY(1, 1) PRIMARY KEY CLUSTERED, VALUE VARCHAR(100))
3. AS
4. BEGIN
5.    INSERT @VALUES
6.    SELECT
7.       VALUE = SUBSTRING(@InputText, Num, CHARINDEX(',', @InputText + ',', Num) - Num)
8.    FROM Numbers
9.    WHERE
10.       SUBSTRING(',' + @InputText, Num, 1) = ','
11.       AND Num <= Datalength(@InputText) + 1
12.     RETURN
13. END

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[SeanJA]

In keeping with my inefficient ruby coding, here is my ungainly answer:

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1. class Float
2.   #since I am lazy,
3.   #http://www.codecodex.com/wiki/index.php?title=Round_a_number_to_a_specific_decimal_place#Ruby
4.   def round_to(x)
5.     (self * 10**x).round.to_f / 10**x
6.   end
7. end
8.  
9.  
10. class Integer
11.   @@bytes = 1024.0
12.   @@size = 0
13.    #1024
14.  
15.   def bytes
16.     @@size = (self/@@bytes).floor
17.     #puts @@size
18.     if (@@size <= 1024)
19.       puts (self/@@bytes**1).round_to(2).to_s + " Kilobytes"
20.     else
21.       @@size = (@@size/@@bytes).floor
22.       #puts @@size
23.       if (@@size <= 1024)
24.         puts (self/@@bytes**2).round_to(2).to_s+ " Megabytes"
25.       else
26.         @@size = (@@size/@@bytes).floor
27.         #puts @@size
28.         if (@@size <= 1024)
29.           puts (self/@@bytes**3).round_to(2).to_s + " Gigabytes"
30.         else
31.           @@size = (@@size/@@bytes).floor
32.           if (@@size <= 1024)
33.             puts (self/@@bytes**4).round_to(2).to_s + " Terrabytes"
34.           else
35.             @@size = (@@size/@@bytes).floor
36.             #puts @@size
37.             if (@@size <= 1024)
38.               puts (self/@@bytes**5).round_to(2).to_s + " Petabytes"
39.             else
40.               @@size = (@@size/@@bytes).floor
41.               #puts @@size
42.               if (@@size <= 1024)
43.                 puts (self/@@bytes**6).round_to(2).to_s + " Exabytes"
44.               else
45.                 @@size = (@@size/@@bytes).floor
46.                 if (@@size <= 1024)
47.                   puts (self/@@bytes**7).round_to(2).to_s+ " Zettabytes"
48.                 else
49.                   @@size = (@@size/@@bytes).floor
50.                   if (@@size <= 1024)
51.                     puts (self/@@bytes**8).round_to(2).to_s + " Yottabytes"
52.                   else
53.                     puts "Wow, I don't know what to call that!"
54.                   end
55.                 end
56.               end
57.             end
58.           end
59.         end
60.       end
61.     end
62.   end  
63. end
64.  

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It does however return the right things, which is good. I think I should probably redo it with a loop...

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1. #puts "kilo"
2. 54831.bytes
3. #puts "mega"
4. 1384120.bytes
5. #puts "giga"
6. 24568971464.bytes
7. #puts "terra"
8. 7392649371023.bytes
9. #puts "peta"
10. (1023**6).bytes
11. #puts "zetta"
12. (1025**7).bytes
13. #puts "yotta"
14. (1077**8).bytes
15. #puts "Wow!"
16. (1077**9).bytes
17.  

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1. 53.55 Kilobytes
2. 1.32 Megabytes
3. 22.88 Gigabytes
4. 6.72 Terrabytes
5. 1018.01 Petabytes
6. 1.01 Zettabytes
7. 1.5 Yottabytes
8. Wow, I don't know what to call that!
9.  

[chrissie1]

There are 2 types of winner - a "People's Champion" (the one with the most rating points across all their posts) and the LTD Admin's Champion (selected with our special formula....honest...well, maybe it's just the ones that the admins thought were particularly good )

So...

People's Champion: b3orn scoring 14 points for his answer

LTD Admin's Champion: SeanJA for having the uggliest code (being original is always a bonus on LTD).


Congratulations to all.. and good luck on next weeks puzzle

[Emtucifor]

Terrabytes.

ugh!

[tisodotsk]

My PHP solution:

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1. <?php
2. //ltd7.php - LTD Puzzle 7: format bytes and add postfixes
3. //via Topic2245: LTD Puzzle 7: format bytes and add postfixes
4. //------------------------------------------------------------------------------
5. function FormatBytes($bytes)
6. {
7.     $postfixes=array('Bytes', 'Kilobytes', 'Megabytes', 'Gigabytes', 'Terabytes',
8.                      'Petabytes', 'Exabytes', 'Zettabytes', 'Yottabytes');
9.     $exp=0;
10.     while($bytes > 1024){
11.         $bytes=$bytes/1024;
12.         $exp++;
13.     }
14.     return round($bytes, 2).' '.$postfixes[$exp];
15. }
16. //------------------------------------------------------------------------------
17. echo FormatBytes(54831).'<br>';
18. echo FormatBytes(1384120).'<br>';
19. echo FormatBytes(24568971464).'<br>';
20. echo FormatBytes(7392649371023).'<br>';
21. //------------------------------------------------------------------------------
22. ?>

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Output:

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1. 53.55 Kilobytes
2. 1.32 Megabytes
3. 22.88 Gigabytes
4. 6.72 Terabytes