• Guardian Bob (unregistered)

    Yeah, the point of perl is to do as much on one line as possible. For example, Towers of Hanoi:
    <BR>
    <code>sub a{if(my$l=pop){a(@[0,2,1],--$l);print"Move disc $l from $[0] to $[2]
    ";a(@    [1,0,2],$l);}}a 'A'..'C',pop;</code><p>
    Or, (in this case) use the lc() function of perl

  • Jason (unregistered)

    Something like this should work:

    byte[] ret = new byte[100];
    int sofar = 0;
    foreach(DictionaryEntry d in h)
    {
    string s = (string)d.Value;
    System.Text.Encoding.ASCII.GetBytes(s,0,s.Length,ret,sofar);
    sofar += s.Length;
    }

  • Maciej Ceglowski (unregistered)

    This one earns extra WTF points for the i flag (ignore case), the completely irrelevant s flag (which tells Perl to match . on newlines), and gratuitious use of the comment marker as a regular expression delimiter.

    I bet you could really speed this baby up by adding the o flag (compile each regex once, instead of every time the subroutine is called)! And think of the job security when it's time to make the application support Unicode.

  • Jason (unregistered)

    Oh yeah, h is a Hashtable (of strings, of course). Missed a line there.

  • Alan Bellingham (unregistered)

    And if you don't want to trust lc(), then how about

    tr/A-Z/a-z/;

  • Chad (unregistered)

    Jason, you need to resize the "ret" byte array, or that code would throw an array size exception.

    the following would work, however it is not the most efficient code in the world:

    Hashtable hash = new Hashtable();
    hash.Add("string 1", "string 1 value");
    hash.Add("string 2", "string 2 value");
    hash.Add("string 3", "string 3 value");

    ArrayList arr = new ArrayList();
    foreach(string str in hash.Values)
    {
    char[] chars = str.ToCharArray();
    foreach(char c in chars)
    arr.Add((byte)c);
    }
    byte[] bArr = (byte[])arr.ToArray(typeof(byte));

  • Manni (unregistered)

    I've seen people defend some of the weirdest code on this site that the vast majority collectively agrees is a WTF. I'd love to see someone defend this.

    I'm not condemning the author of this code though, because I wrote a very inefficient and comical implementation of VB's Replace() function. Then again, the author knows enough to use regular expressions (not very well), but doesn't know about lc().

  • Jason (unregistered)

    Yeah, I agree about the Array size. I wasn't going for genericity, just an example ;)

    BTW, I didn't know that you could cast a char straight to a byte. Good to know.

  • Mike (unregistered)

    Here's a C# way to do it. Don't know if this is exactly what you want, but it works.

    ArrayList a = new ArrayList();

    foreach( string s in yourHashTable )
    {
    a.Add( System.Text.Encoding.Default.GetBytes( s ) );
    }

    byte[] hashTableStringBytes = (byte[])a.ToArray( typeof( byte ) );

  • Mork van Ork (unregistered)

    Alex, use postgres. And while you're at it, move this site to a real OS unless you can stand the humiliation to have your frontpage defaced to display your own code ;-)

  • Alex Papadimoulis (unregistered)

    Thanks Jason & Mike; that should definately do the trick to get them in. Now how do we get it out of a byte array?

    And Mork, I think you misunderstood. This site is running on Windows 2003, not some hippie freeware thrown together by a bunch of stoned slackers. ;-).

  • Voytek (unregistered)

    Or maybe this:

    Hashtable ht = new Hashtable();
    ht[0] = "aaa";
    ht[1] = "bbb";
    ht[2] = "ccc";

    MemoryStream stream = new MemoryStream();
    new BinaryFormatter().Serialize(stream, ht.Values);
    byte[] bytes = stream.ToArray();

  • RichB (unregistered)

    Jason wrote:
    > I didn't know that you could cast a char straight to a byte. Good to know.
    Compile this code, then use ildasm to look at the generated IL - you'll see why it is possible to cast a char to a byte

    class X { static void Main() { char a='A'; System.Console.WriteLine(a); } }

  • Chad Grant (unregistered)

    You need some sort of delimiter, I used \r and \n

    public static void Main()
    {
    Hashtable hash = new Hashtable();
    hash.Add("string 1", "string 1 value");
    hash.Add("string 2", "string 2 value");
    hash.Add("string 3", "string 3 value");

    byte[] bArr = HashToByteArray(hash);
    hash = ByteArrayToHashtable(bArr);


    foreach(object key in hash.Keys)
    Console.WriteLine(String.Format("Key:{0} Value:{1}",key, hash[key]));

    RL();
    }

    private static byte[] HashToByteArray(Hashtable hash)
    {
    char keyValueDelim = '\n';
    char delim = '\r';

    ArrayList arr = new ArrayList();
    foreach(object key in hash.Keys)
    {
    foreach(char c in key.ToString())
    arr.Add((byte)c);

    arr.Add((byte)keyValueDelim);

    foreach(char c in hash[key].ToString())
    arr.Add((byte)c);

    arr.Add((byte)delim);
    }
    return (byte[])arr.ToArray(typeof(byte));
    }

    private static Hashtable ByteArrayToHashtable(byte[] bArr)
    {
    char keyValueDelim = '\n';
    char delim = '\r';

    string[] keyVals = Encoding.Default.GetString(bArr).Split(delim);

    Hashtable hash = new Hashtable();
    foreach(string str in keyVals)
    {
    if (str == String.Empty)
    continue;

    string[] keyVal = str.Split(keyValueDelim);
    hash.Add(keyVal[0],keyVal[1]);
    }
    return hash;
    }

  • Ian Bicking (unregistered)

    Well, if I was going to do write this code, I'd be afraid of typos. So I'd probably write a program to write the program; much more efficient.


    print "sub utl {\n $i = $[0];\n";
    for ($i=0; $i < 26 ; $i++) {
    print " $i =~ s#"
    .chr(ord('A')+$i)."#".chr(ord('a')+$i)."#gsi;\n";
    }
    print " return $i;\n}\n";

    I'm not much of a Perl programmer, or I could probably do it in fewer lines. Or I guess you could do:

    print "sub utl {return lc($    [0];}\n";

    But at that point you should really make this reusable, like:

    sub genfunc {print "sub $[0] {return $1;}\n";}
    genfunc "utl", "lc";

    As you can probably tell, I'm just addicted to reusability. I could easily write 7.5-10k lines a day with only a few hundred lines of code. And after one day, I could keep reusing that code, pumping out another 7.5-10k of code each day without even writing any new code; now that is efficiency! Damn I'm good.

  • AvonWyss (unregistered)

    private static byte[] HashToByteArray(Hashtable hash)
    {
    char keyValueDelim = '\n';
    char delim = '\r';

    ArrayList arr = new ArrayList();
    foreach(object key in hash.Keys)
    {
    foreach(char c in key.ToString())
    arr.Add((byte)c);

    arr.Add((byte)keyValueDelim);

    foreach(char c in hash[key].ToString())
    arr.Add((byte)c);

    arr.Add((byte)delim);
    }
    return (byte[])arr.ToArray(typeof(byte));
    }

    Come on, you can't be serious. Ever heard of UNICODE and chars not in the US-ASCII set? No? You CANNOT reliably convert a char to a byte. Put in some äöüàéè etc. and it will fail.

  • Chad Grant (unregistered)

    AvonWyss , It works fine, dumbass.

  • Phil Scott (unregistered)

    I'm curious as to how the mysterious "hashtable of strings to a byte array" function helps in terms of not needing a dedicated database server personally.

    this site can't possibly be that taxing on a server, can it?

  • Chad Grant (unregistered)

    In the end, no one knows what the heck this is to be used for, what would be in the hashtables, etc... so how could we write the perfect code for him.

  • AvonWyss (unregistered) 
    public static byte[] HashtableContainingStringsOnlyToBytes(Hashtable input) {


    using (MemoryStream stream=new MemoryStream()) {
    using (BinaryWriter writer=new BinaryWriter(stream, Encoding.UTF8)) {
    writer.Write(input.Count);
    foreach (DictionaryEntry entry in input) {
    writer.Write((string)entry.Key);
    writer.Write((string)entry.Value);
    }
    writer.Flush();
    return stream.ToArray();
    }
    }
    }

    public static Hashtable BytesToHashtableContainingStringsOnly(byte[] input) {
    using (BinaryReader reader=new BinaryReader(new MemoryStream(input), Encoding.UTF8)) {
    int count=reader.ReadInt32();
    Hashtable result=new Hashtable(count);
    for (int i=0; i<count; i++) {
    result.Add(reader.ReadString(), reader.ReadString());
    }
    return result;
    }

  • Kelsey (unregistered)

    Casting from char to byte

    Don't do it, you're ignoring any encodings that the char may have. In particular, if you have anything other than ascii characters, then casting from a char to a byte will fail to give you meaning full results.

    I'm from the land beyond OZ in java, but I'm sure that C# will have encoding transformers in it.

  • AvonWyss (unregistered)

    It does? With your code, for the strings:
    hash.Add("string 1 äöü", "string 1 value");
    hash.Add("string 2 àéè", "string 2 value");
    hash.Add("string 3 ???", "string 3 value");

    I get the output:
    Key:string 2 …‚Š Value:string 2 value
    Key:string 1 „” Value:string 1 value
    Key:string 3 … ƒ Value:string 3 value

    So it DOES NOT work. Not to say that any \r \n will break your code. I'd think again the next time before you call someone a dumbass.

  • AvonWyss (unregistered)

    (I had some chars from the arabic alphabeth in the string 3, which unfortunately are not recognized here, but at least gracefully handled and displayed as '?')

  • Alex Papadimoulis (unregistered)

    @Phil Scott

    as you know, I had to limit the RSS feeds to 1 item. I want to bring it to 10, but my home cable connection can't handle it: http://thedailywtf.com/stats .. last week, with one item a day.

    I want a dedicated server because ... well, why not. But, if I get a server, I need to buy SQL Server. I dont mind the $150/mo. But I do mind the $2500+ software costs, especially for Version 2000, as 2005 is due soon.

    So in the mean time I've signed up with a shared hosting provider (1&1 hosting). Unfortunately, they're lousy bastards and restrict the hell out of .NET code. No signed assemblies (easy fix), and apparently the BinaryFormatter class is restricted. Hence why I'm asking for a workaround.

    It's all good, I'm going to save the $ from the ads and put it into the "Sql Server fund". Hopefully when 2005 comes out, there will be enough saved to pay for a small portion, and I wont feel so bad forking over the $$$.

  • AvonWyss (unregistered)

    @ Alex Papadimoulis

    I have a web site with http://www.discountasp.net/ and I am completely satisfied. They offer a unrestricted service, good and quick support, and you can also have SQL2000 databases for very little money.

    (I'm not affiliated with them, just a happy customer!)

  • Curt Sampson (unregistered)

    Hmmm. I wonder if the URLs are fixed yet? Or are we still not allowing urls, but only URLs starting with "http:"? As well, what's the encoding of your page? On my system it comes out as Shift_JIS, but I suspect that's not what you want.

    Anyway, those gripes aside, I suggest you give PostgreSQL a try. I've used both it and SQL Server extensively, and PostgreSQL compares pretty well. It's a real DBMS, not a lame attempt like MySQL.

  • Joe White (unregistered)

    My site is hosted with www.webhost4life.com, and while there's few seconds' lag every now and then as it JIT-compiles my ASP.NET code, other than that I have no complaints. Their tech support is fairly responsive, and $10 a month gets you both ASP.NET and an SQL Server database.

    And instead of buying MSSQL, couldn't you just use MSDE? I don't recall any restrictions against using it on a server, though it's been a while since I read its license agreement.

  • Chad (unregistered)

    AvonWyss, there must be something wrong with your Console. I get the same output as I do input with that code. I do understand unicode, HOWEVER this site is in English. Here is the Unicode version, not that unicode is some big mystery, but this code outputs twice the amount of bytes, since unicode uses 2 bytes, and ASCII only one. So.... you decide... ASCII or Unicode, eat a bowl of d*ck either way

    private static byte[] HashToByteArray(Hashtable hash)
    {
    char keyValueDelim = '\n';
    char delim = '\r';

    StringBuilder sb = new StringBuilder();
    foreach(object key in hash.Keys)
    sb.AppendFormat("{0}{1}{2}{3}", key, keyValueDelim, hash[key], delim);
    return Encoding.Unicode.GetBytes(sb.ToString());
    }

    private static Hashtable ByteArrayToHashtable(byte[] bArr)
    {
    char keyValueDelim = '\n';
    char delim = '\r';

    Hashtable hash = new Hashtable();
    foreach(string str in Encoding.Unicode.GetString(bArr).Split(delim))
    if (str.Trim() != String.Empty)
    hash.Add(str.Split(keyValueDelim)[0],str.Split(keyValueDelim)[1]);
    return hash;
    }

  • Matt Ryall (unregistered)

    Alex said: "This site is running on Windows 2003, not some hippie freeware thrown together by a bunch of stoned slackers."

    So you won't be using the hippie freeware code provided by the stoned slackers above for your Hashtable problem? You'd prefer to pay some company to come up with a half-baked unstable solution?

    You can hardly knock collaborative open development when you're promoting it on your own site.

  • wulong (unregistered)

    I won't trust no dang hippie with my hashtable problem... they'll smoke it all!

    (sorry, couldn't help myself ;)

  • AvonWyss (unregistered)

    Chad, ther's nothing wrong with my console. But there's something seriously wrong with your attitude. The comments and the code you posted do talk for themselfes; even your unicode solution does break as soon as there are \r and/or \n contained in any of the strings.

    For a working and efficient solution, check out my previous comment:
    http://thedailywtf.com/archive/2004/11/04/3303.aspx#3327

    I don't think I have to add anything. Just maybe that the code you posted could be used as a WTF, at least that's what came to my mind when I saw your attempts to solve that problem.

  • Lothar (unregistered)

    @Chad:
    >HOWEVER this site is in English. Here is the
    >Unicode version, not that unicode is some big
    >mystery, but this code outputs twice the amount
    >of bytes, since unicode uses 2 bytes, and ASCII
    >only one. So.... you decide... ASCII or Unicode,
    >eat a bowl of d*ck either way

    man UTF-8

    Unicode you need in the moment you want to use exotic things like the euro-symbol (which is not #0x80 but #0x20AC)

  • jasmine strong (unregistered)

    The Euro symbol is hardly exotic; it's the biggest currency in the world!

  • Sergio Pereira (unregistered)

    Everybody got the Hastable question wrong :) I think Alex meant that he wanted the answer in true WTF style :P

    int byteCount=0;
    string key0 = (string)hashtable.Keys[0];
    byte key0byte0 = (byte)key0[0];
    byteCount++;
    byte key0byte1 = (byte)key0[1];
    byteCount++;
    ...
    string value0 = (string)hashtable.Values[0];
    byte value0byte0 = (byte)value0[0];
    byteCount++;
    byte value0byte1 = (byte)value0[1];
    byteCount++;
    ...
    string key1 = (string)hashtable.Keys[1];
    byte key1byte0 = (byte)key1[0];
    byteCount++;
    byte key1byte1 = (byte)key1[1];
    byteCount++;
    ...
    string value1 = (string)hashtable.Values[1];
    byte value1byte0 = (byte)value1[0];
    byteCount++;
    byte value1byte1 = (byte)value1[1];
    byteCount++;
    ...

    byte[] bytes = new byte[byteCount];
    int currentIndex = 0;
    bytes[0] = key0byte0;
    if(byteCount==0) return bytes;
    bytes[1] = key0byte1;
    if(byteCount==1) return bytes;
    ...
    //make sure you write enough code lines
    // like above to allow for maximum capacity!


    The inverse process is left as an brainteaser for the readers :)

  • Bart Park (unregistered)

    The belief that unicode means 2 bytes is also a WTF. Here is a fairly good overview of unicode and character sets.

    http://www.joelonsoftware.com/articles/Unicode.html

    How many WTF's can you get in one WTF, anyway?

  • AvonWyss (unregistered)

    Thanks Bart, but I doubt that my friend Chad will get that...

  • Phil Scott (unregistered)

    Ah, well doesn't that suck about the BinaryFormatter. I was curious as to why the work around was needed.


    Have you thought about using HTTP compression? We saw a 90% decrease in our traffic on some text heavy pages with little impact on the performance of the over all servers.

  • Jason (unregistered)

    @Kelsey,

    >I'm from the land beyond OZ in java, but I'm >sure that C# will have encoding transformers >in it.

    Yes, it does: System.Text.Encoding.ASCII|Unicode.


    @Everyone who mentioned the non-safeness of directly casting char to byte

    Thanks - that's at least as good to know as that it can be done ;)

  • Daniel H. (unregistered)

    Well, at least I am happy to see that some guys admit that the computer world doesn't end at the US borders...

  • Fogelman (unregistered)

    String.ToCharArray() does your per item work in and (char []).ToString() out.

    Hastable.CopyTo gives you an array representation.

    If stream in / out etc then create a thin wrapper around a static Hashtable or StringDictionary etc, then hand code

    protected MyObject(SerializationInfo info, StreamingContext context)
    {
    // Get Serialization Enumerator from info.GetEnumerator()
    // GetNext() to start,
    // then.. Key = GetNext, Value = GetNext, Add hashtable item until enum exahusted.
    // Since you only put in pairs, you only get back pairs. Alignment not an issue.
    }
    [SecurityPermissionAttribute(SecurityAction.Demand,SerializationFormatter
    =true)]
    public virtual void GetObjectData(SerializationInfo info, StreamingContext context)
    {
    foreach hashtable item
    .. info.Add(/* strongly typed version to avoid reflection*/)
    }

  • Peter da Silva (unregistered)

    You don't need to use a hippie californian OS to run PostgreSQL, I'm sure it'll run under that professional coffee-drinking subsystem from the Pacific Northwest that those outstanding blokes from Redmond ship in Services for UNIX 3.5...

  • mauke (unregistered)

    @ Maciej Ceglowski:
    Using /o for this would be another WTF. Perl compiles constant
    regexes at compile time anyway. /o is for when you have a pattern containing
    variables and you want to tell Perl that their content never changes. But in
    that case it would be probably better to use qr//.

  • (cs) in reply to Alex Papadimoulis
    Alex Papadimoulis:
    Thanks Jason & Mike; that should definately do the trick to get them in. Now how do we get it out of a byte array?

    And Mork, I think you misunderstood. This site is running on Windows 2003, not some hippie freeware thrown together by a bunch of stoned slackers. ;-).

    This post and forum have been brought to you by Microsoft.

  • Random Article Viewer (unregistered)

    Internal link is broken...

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