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What's valid and what's not in a URI query?

I've been Googling this back and forth reading RFCs and SO questions trying to crack this, but I still don't got jack. 7 An...
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What is the difference between up-casting and down-casting with respect to class variable

What is the difference between up-casting and down-casting with respect to class variable? 10 Answers ...
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CSS scrollbar style cross browser [duplicate]

...CSS scrollbar style cross browser? I tested this code, it only works in IE and opera, but failed in Chrome, Safari and Firefox. ...
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Find() vs. Where().FirstOrDefault()

I often see people using Where.FirstOrDefault() to do a search and grab the first element. Why not just use Find() ? Is there an advantage to the other? I couldn't tell a difference. ...
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C# delete a folder and all files and folders within that folder

I'm trying to delete a folder and all files and folders within that folder, I'm using the code below and I get the error Folder is not empty , any suggestions on what I can do? ...
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R.exe, Rcmd.exe, Rscript.exe and Rterm.exe: what's the difference?

...ce between R.exe (with or without CMD BATCH option), Rcmd.exe, Rscript.exe and Rterm.exe when running command line in a batch file? ...
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Why do Chrome and IE put “Mozilla 5.0” in the User-Agent they send to the server? [duplicate]

... See: user-agent-string-history It all goes back to browser sniffing and making sure that the browsers are not blocked from getting content they can support. From the above article: And Internet Explorer supported frames, and yet was not Mozilla, and so was not given frames. And Microsoft ...
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NSIS内置路径命令详解 - C/C++ - 清泛网 - 专注C/C++及内核技术

...$STARTMENU=相对应用户名称的「开始」菜单;如:C:\Documents and Settings\Administrator\「开始」菜单! $SMPROGRAMS=相对应用户名称的「开始」菜单\程序;如:C:\Documents and Settings\Administrator\「开始」菜单\程序 $QUICKLAUNCH=相对应用户名称...
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Difference between JSP EL, JSF EL and Unified EL [closed]

...difference between the Expression Languages (EL). There is JSP EL, JSF EL and Unified EL. 2 Answers ...
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Do you need to dispose of objects and set them to null?

Do you need to dispose of objects and set them to null, or will the garbage collector clean them up when they go out of scope? ...