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   comp.protocols.tcp-ip      TCP and IP network protocols.      14,669 messages   

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   Message 14,509 of 14,669   
   skybuck2000 to All   
   Font: Courier New Size: 9 is flawed for    
   07 Dec 20 23:40:08   
   
   From: skybuck2000@hotmail.com   
      
   I just ran into the stranges code:   
      
   var   
     Lan1 : SomeType;   
   begin   
     Lanl.SomeFunction();   
      
   The compiler nagged it couldn't find the variable.   
   So I copied the code into textpad which uses slightly bigger font.   
   Thanks to the bigger font I noticed the difference between 1 and l.   
   Otherwise it was hard to catch and I might have believed it may have been some   
   strange unicode symbol.   
      
   Turns out the courier new font at size 9 is simply flawed for programming, the   
   1 and l is exactly the same. Even at higher sizes the difference is minor, 1   
   pixel or so. Perhaps not use this font anymore for programming or make a   
   slight change to it so    
   the 1 and l remains different at hopefully all font sizes !   
      
   (My current Delphi 10.2 development environment uses it ! Not sure if this is   
   the default or if I set it like that ! ;))   
      
      
   Euhm my recommendation is to write all C/C++ code for confuscating contests   
   with 1 and l symbols only for futher complexifieing analysis of code ! LOL.   
      
   I also took the courtesy of adding this warning to the wikipedia about courier   
   new, feel free to start a wiki war with me and others ! LOL =D   
      
   https://en.wikipedia.org/wiki/Courier_(typeface)#In_computer_programming   
      
   My soon to be famous text added is:   
      
   "   
   Warning   
   This font is not suited for programming or any other serious documentation.   
   The numeric one and small letter L look to similiar example: 1 vs l    
   On some development environments it's exactly the same depending on font size,   
   for example at size 9 the one pixel difference is gone.    
   "   
      
   Bye,   
     Skybuck.   
      
   P.S.: When I discovered this bug I went like: "HOOOOLLYYYSHIIIT"   
      
   Then later: "PPPPPPFFFFFFffffff"   
      
   Also I am not the first to have found this, there are a few other mentions   
   found by google !   
      
   P.S.2: For fun let me know if your current newsgroup/mail reader has this   
   problem too, or your development environment, or document editor would be   
   funny to know ! =D   
      
   P.S.3: I wonder if a NASA or ESA space lander will someday crash because of a   
   wrong l vs 1 ! LOL. Perhaps by uploading a wrong script or wrong math formulas   
   ) :)   
      
   P.S.4: I recommend writing a computer program that does a visual inspection of   
   all symbols vs all symbols (for all font sizes) (and even all fonts !) and do   
   a pixel by pixel comparision to detect any other similiar problems or perhaps   
   too few pixel    
   differences !   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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