The Magician's String, what you see is not what you get.
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static void Main(string[] args)
{
String str1 = "http://toto.com/";
String str2 = "http://toto.com/";
bool eq = str1 == str2;
Console.WriteLine(eq); //print falsestr1 = "http://toto.com/"; str2 = "http://toto.com/"; eq = str1 == str2; Console.WriteLine(eq); //print true}
See for yourself, but copy the code, do not retype it. :) I lost hair on this one, bug on an actual project for one customer. But it is a nice trick to do to one of your most hated co worker if his computer is unlocked... Also works in configuration files. ;) This is pure evil though. [UPDATE] With some advice I found even more evil than that.
"а" == "a" //false
Ohhhh that's evil! I love it! :laugh:
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Dave Kreskowiak -
Ironnically, the best tool that can show it to you is command line. Even notepad would not show. EDIT : TextPad seems to work
Notepad will, with the correct typeface -- try Terminal.
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Notepad will, with the correct typeface -- try Terminal.
I tried to change font, and encoding, nothing do. I even tried to copy the string in the command line, and don't get the ?. How did you do ?
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I tried to change font, and encoding, nothing do. I even tried to copy the string in the command line, and don't get the ?. How did you do ?
On the command line I use "Raster fonts" 7x12. (Win 7)
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On the command line I use "Raster fonts" 7x12. (Win 7)
I also have, I think the problem is that I am using "clink" as my command line program. However, on powershell, I get the missing char ! But Notepad, would not show me anything.
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I also have, I think the problem is that I am using "clink" as my command line program. However, on powershell, I get the missing char ! But Notepad, would not show me anything.
I expect it has to be a non-truetype typeface. I also see it with "Nifty Terminal".
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I expect it has to be a non-truetype typeface. I also see it with "Nifty Terminal".
Yes you are right on Terminal. It definitively shows me, I was trying other fonts. ;) Need to train myself about what font, truetype, and typeface means :)
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static void Main(string[] args)
{
String str1 = "http://toto.com/";
String str2 = "http://toto.com/";
bool eq = str1 == str2;
Console.WriteLine(eq); //print falsestr1 = "http://toto.com/"; str2 = "http://toto.com/"; eq = str1 == str2; Console.WriteLine(eq); //print true}
See for yourself, but copy the code, do not retype it. :) I lost hair on this one, bug on an actual project for one customer. But it is a nice trick to do to one of your most hated co worker if his computer is unlocked... Also works in configuration files. ;) This is pure evil though. [UPDATE] With some advice I found even more evil than that.
"а" == "a" //false
:thumbsup::thumbsup::thumbsup:
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L %^]*IRXD#@GKCQ`R\^SF_WcHbORY87֦ʻ6ϣN8ȤBcRAV\Z^&SU~%CSWQ@#2 W_AD`EPABIKRDFVS)EVLQK)JKQUFK[M`UKs*$GwU#QDXBER@CBN% R0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>
----------------------------------------------- 128 bit encrypted signature, crack if you can
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static void Main(string[] args)
{
String str1 = "http://toto.com/";
String str2 = "http://toto.com/";
bool eq = str1 == str2;
Console.WriteLine(eq); //print falsestr1 = "http://toto.com/"; str2 = "http://toto.com/"; eq = str1 == str2; Console.WriteLine(eq); //print true}
See for yourself, but copy the code, do not retype it. :) I lost hair on this one, bug on an actual project for one customer. But it is a nice trick to do to one of your most hated co worker if his computer is unlocked... Also works in configuration files. ;) This is pure evil though. [UPDATE] With some advice I found even more evil than that.
"а" == "a" //false
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So, for us mortals, care to explain what is going on here ?
~RaGE();
I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus Entropy isn't what it used to.
Magic. :) str2 is a string with an hidden character. If you copy my code, you copy the hidden character, so this bug follow you in whatever programming language. You can execute the code in debug mode, and see that str2 is length +1 str1. However, I have no idea how I ended up with this hidden character in my code. (the int value of this strange character is 0x200f)
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static void Main(string[] args)
{
String str1 = "http://toto.com/";
String str2 = "http://toto.com/";
bool eq = str1 == str2;
Console.WriteLine(eq); //print falsestr1 = "http://toto.com/"; str2 = "http://toto.com/"; eq = str1 == str2; Console.WriteLine(eq); //print true}
See for yourself, but copy the code, do not retype it. :) I lost hair on this one, bug on an actual project for one customer. But it is a nice trick to do to one of your most hated co worker if his computer is unlocked... Also works in configuration files. ;) This is pure evil though. [UPDATE] With some advice I found even more evil than that.
"а" == "a" //false
Compileonline.com[^] will shows you the buggy char on
String str2. Interesting though. :)Wonde Tadesse
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Compileonline.com[^] will shows you the buggy char on
String str2. Interesting though. :)Wonde Tadesse
did not know this tool ! good to know.
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Magic. :) str2 is a string with an hidden character. If you copy my code, you copy the hidden character, so this bug follow you in whatever programming language. You can execute the code in debug mode, and see that str2 is length +1 str1. However, I have no idea how I ended up with this hidden character in my code. (the int value of this strange character is 0x200f)
Another thing that bit me before was an UTF-8 preamble or BOM with the bytes 0xEF, 0xBB, 0xBF that got copied from somewhere... :doh:
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Another thing that bit me before was an UTF-8 preamble or BOM with the bytes 0xEF, 0xBB, 0xBF that got copied from somewhere... :doh:
Already got it, if you create a text file with visual studio, it bites you.
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static void Main(string[] args)
{
String str1 = "http://toto.com/";
String str2 = "http://toto.com/";
bool eq = str1 == str2;
Console.WriteLine(eq); //print falsestr1 = "http://toto.com/"; str2 = "http://toto.com/"; eq = str1 == str2; Console.WriteLine(eq); //print true}
See for yourself, but copy the code, do not retype it. :) I lost hair on this one, bug on an actual project for one customer. But it is a nice trick to do to one of your most hated co worker if his computer is unlocked... Also works in configuration files. ;) This is pure evil though. [UPDATE] With some advice I found even more evil than that.
"а" == "a" //false
I once read a kind of ironic posting about what you could do to obscrure your code (and this way make yourself irreplacable). One of the topics was using similar letters from different alphabets in variable names. They used the example of the Cyrillic 'a' which looks just like the Latin 'a' but is seen as different by the compiler. I assume you could have reached a similar effect by using a Cyrillic 'r' instead of the Latin 'p' in the URL. :-D
The good thing about pessimism is, that you are always either right or pleasently surprised.
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I once read a kind of ironic posting about what you could do to obscrure your code (and this way make yourself irreplacable). One of the topics was using similar letters from different alphabets in variable names. They used the example of the Cyrillic 'a' which looks just like the Latin 'a' but is seen as different by the compiler. I assume you could have reached a similar effect by using a Cyrillic 'r' instead of the Latin 'p' in the URL. :-D
The good thing about pessimism is, that you are always either right or pleasently surprised.
Did not know that, this is even more evil than the invisible character. I take some notes. You can spot the invisible char by doing str1.Length, but a Cyrillic 'a'... huhu. :)
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I once read a kind of ironic posting about what you could do to obscrure your code (and this way make yourself irreplacable). One of the topics was using similar letters from different alphabets in variable names. They used the example of the Cyrillic 'a' which looks just like the Latin 'a' but is seen as different by the compiler. I assume you could have reached a similar effect by using a Cyrillic 'r' instead of the Latin 'p' in the URL. :-D
The good thing about pessimism is, that you are always either right or pleasently surprised.
Yes, Unicode can be very handy. "the Greek letter Tau (t) (Unicode U+03A4) which looks enough like the Latin letter T" -- Sorting 'Total' after data values[^]
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Yes, Unicode can be very handy. "the Greek letter Tau (t) (Unicode U+03A4) which looks enough like the Latin letter T" -- Sorting 'Total' after data values[^]
Does the Terminal font trick would find the bug ? :D
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Did not know that, this is even more evil than the invisible character. I take some notes. You can spot the invisible char by doing str1.Length, but a Cyrillic 'a'... huhu. :)
Well, some phishers used that in web addresses. Then, browsers were changed to show some encoded values in the address bar for such characters.
www.dеutsсhеbаnk.соmlooks so nice at first view, but Firefox changes it intowww.xn--dutshbnk-66g8be6l.xn--m-0tbinowadays. -
Compileonline.com[^] will shows you the buggy char on
String str2. Interesting though. :)Wonde Tadesse